diff --git a/schema/codelists/classificationScheme.csv b/schema/codelists/classificationScheme.csv
index 359e7efb5..d3bf9c7f9 100644
--- a/schema/codelists/classificationScheme.csv
+++ b/schema/codelists/classificationScheme.csv
@@ -6,18 +6,18 @@ UNSPSC,United Nations Standard Products and Services Code,The United Nations Sta
 CPC,Central Product Classification,"The Central Product Classification (CPC) is a product classification for goods, services and works promulgated by the United Nations Statistical Commission. It is intended to be an international standard for organizing and analyzing data on industrial production, national accounts, trade and prices.",https://unstats.un.org/unsd/classifications/Econ/cpc,item
 OKDP,Russian National Classification of Products by Economic Activity (1994),"Part of the unified system of classification and coding of technical, economic and social information of the Russian Federation, in use for Russian Procurement information until January 1, 2016. Superseded by OKPD.",http://base.consultant.ru/cons/cgi/online.cgi?req=doc;base=LAW;n=143095;fld=134;from=14052-7;rnd=0.33374630799517035,item
 OKPD,Russian National Classification of Products by Economic Activity (2014),"Part of the national standardization system of the Russian Federation and based on harmonization with the Statistical Classification of Products by Activity in the European Economic Community, 2008. In use from January 1 2014.",http://base.consultant.ru/cons/cgi/online.cgi?req=doc;base=LAW;n=163703;fld=134;from=170864-15;rnd=0.39699640963226557,item
-CUCOP,Mexican Single Classifier of Public Procurement,"The Single Classifier of Public Procurement (Clasificador Único de las Contrataciones Públicas) is a national scheme in Mexico for the classification of goods, services, works, and leases.",https://sites.google.com/site/cnetcucop/,item
-NAICS,North American Industry Classification System,"The North American Industry Classification System (NAICS) is an industry classification system developed by the statistical agencies of Canada, Mexico and the United States. Created against the background of the North American Free Trade Agreement, it is designed to provide common definitions of the industrial structure of the three countries and a common statistical framework to facilitate the analysis of the three economies. NAICS is based on supply-side or production-oriented principles, to ensure that industrial data, classified to NAICS, are suitable for the analysis of production-related issues such as industrial performance.",https://www.census.gov/eos/www/naics/downloadables/downloadables.html,item
+CUCOP,Mexican Single Classifier of Public Procurement,"The Single Classifier of Public Procurement (Clasificador Único de las Contrataciones Públicas) is a national scheme in Mexico for the classification of goods, services, works, and leases.",https://upcp-compranet.hacienda.gob.mx/unidades_compradoras/CUCoP.html,item
+NAICS,North American Industry Classification System,"The North American Industry Classification System (NAICS) is an industry classification system developed by the statistical agencies of Canada, Mexico and the United States. Created against the background of the North American Free Trade Agreement, it is designed to provide common definitions of the industrial structure of the three countries and a common statistical framework to facilitate the analysis of the three economies. NAICS is based on supply-side or production-oriented principles, to ensure that industrial data, classified to NAICS, are suitable for the analysis of production-related issues such as industrial performance.",https://www.census.gov/naics/,item
 PSC,Product and Service Codes,"The Product and Service Codes (PSC) Manual provides codes to describe products, services, and research and development (R&D) purchased by the United States federal government. These codes indicate 'WHAT' was bought for each contract action reported in the Federal Procurement Data System (FPDS).",https://www.acquisition.gov/Psc-manual,item
-HS,Harmonized Commodity Description and Coding System,"The Harmonized System is an international nomenclature for the classification of products. It allows participating countries to classify traded goods on a common basis for customs purposes. At the international level, the Harmonized System (HS) for classifying goods is a six-digit code system.",https://unstats.un.org/unsd/tradekb/Knowledgebase/50018/Harmonized-Commodity-Description-and-Coding-Systems-HS,item
-CELEX,CELEX number,Identifier scheme for EUR-Lex documents,https://eur-lex.europa.eu/content/help/faq/intro.html#help8,legalBasis
+HS,Harmonized Commodity Description and Coding System,"The Harmonized System is an international nomenclature for the classification of products. It allows participating countries to classify traded goods on a common basis for customs purposes. At the international level, the Harmonized System (HS) for classifying goods is a six-digit code system.",https://www.wcotradetools.org/en/harmonized-system,item
+CELEX,CELEX number,Identifier scheme for EUR-Lex documents,https://eur-lex.europa.eu/content/help/eurlex-content/celex-number.html,legalBasis
 LEXML,LexML URN,Identifier scheme for BR-Lex documents,https://projeto.lexml.gov.br/,legalBasis
 COFOG,Classification of the Functions of Government,"A standard classifying the purposes of government activities, developed by the Organisation for Economic Co-operation and Development and published by the United Nations Statistical Division.",https://unstats.un.org/unsd/classifications/Econ/,organization
 proClass,ProClass,ProClass is a procurement classification scheme intended for use by local government in the United Kingdom.,https://proclass.org.uk/,item
 sdg,Sustainable Development Goals,"The Sustainable Development Goals are a collection of 17 interlinked goals set by the United Nations General Assembly and designed to be a ""blueprint to achieve a better and more sustainable future for all"".",https://unstats.un.org/sdgs/indicators/indicators-list/,tender
 sdgTarget,Sustainable Development Goal Targets,The Sustainable Development Goal Targets are specific targets for each Sustainable Development Goal.,https://unstats.un.org/sdgs/indicators/indicators-list/,tender
-TED_CA_TYPE,EU Type of contracting authority (TED schema),The types of contracting authority within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in TED schema.,https://simap.ted.europa.eu/documents/10184/99173/EN_F01.pdf,organization
-TED_CE_ACTIVITY,EU Main activity of contracting entity (TED schema),The main activity of the contracting entity within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in TED schema.,https://simap.ted.europa.eu/documents/10184/99173/EN_F04.pdf,organization
+TED_CA_TYPE,EU Type of contracting authority (TED schema),The types of contracting authority within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in TED schema.,https://ted.europa.eu/documents/d/ted/en_f01,organization
+TED_CE_ACTIVITY,EU Main activity of contracting entity (TED schema),The main activity of the contracting entity within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in TED schema.,https://ted.europa.eu/documents/d/ted/en_f04,organization
 eu-buyer-contracting-type,EU Buyer contracting entity type (eForms),Whether or not the buyer is a contracting entity within the domain of public procurement according to the legislation of the European Parliament.,https://docs.ted.europa.eu/eforms/latest/reference/code-lists/buyer-contracting-type.html,organization
 eu-main-activity,EU Main activity authority list (eForms),The main activity of the contracting entity within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in eForms.,https://op.europa.eu/en/web/eu-vocabularies/concept-scheme/-/resource?uri=http://publications.europa.eu/resource/authority/main-activity,organization
 eu-buyer-legal-type,EU Buyer legal type (eForms),The type of the procuring authority within the domain of public procurement according to the legislation of the European Parliament. This scheme's codes match those in eForms.,https://op.europa.eu/en/web/eu-vocabularies/concept-scheme/-/resource?uri=http://publications.europa.eu/resource/authority/buyer-legal-type,organization
diff --git a/schema/codelists/unitClassificationScheme.csv b/schema/codelists/unitClassificationScheme.csv
index 73229582b..6d0dd9441 100644
--- a/schema/codelists/unitClassificationScheme.csv
+++ b/schema/codelists/unitClassificationScheme.csv
@@ -1,3 +1,3 @@
-Code,Title,Description
-UNCEFACT,UN/CEFACT Recommendation 20,Use the common code from the latest version of the UN/CEFACT Recommendation 20 list of 'Codes for Units of Measure Used in International Trade'.
-QUDT,"Quantities, Units, Dimensions and Data Types Ontologies",Use the [QUDT Code](https://www.qudt.org) value.
+Code,Title,Description,Source
+UNCEFACT,UN/CEFACT Recommendation 20,Use the common code from the latest version of the UN/CEFACT Recommendation 20 list of 'Codes for Units of Measure Used in International Trade'.,https://unece.org/trade/uncefact/cl-recommendations
+QUDT,"Quantities, Units, Dimensions and Data Types Ontologies",Use the QUDT Code value.,https://www.qudt.org