Regulations

Below is a non-exhaustive list of hydrogen related regulations, more focused towards the EU Regulations.

Commission Regulation (EU) No 406/2010 of 26 April 2010 implementing Regulation (EC) No 79/2009 of the European Parliament and of the Council on type-approval of hydrogen-powered motor vehicles:
http://eur-lex.europa.eu/JOHtml.do?uri=OJ:L:2010:122:SOM:EN:HTML

IGC Code, produced by the IMO International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code):
http://www.imo.org/environment/mainframe.asp?topic_id=995

ADR UN ECE Agreement concerning the International Carriage of Dangerous Goods by Road:
http://www.unece.org/trans/danger/publi/adr/adr_e.html

RID is the European Agreement on the International Carriage of Dangerous Goods by Rail. The regulations appear as Appendix C to the Convention concerning International Carriage by Rail (COTIF) concluded at Vilnius on 3 June 1999:
http://www.otif.org/en/law.html

ADN is the European Agreement concerning the International Carriage of Dangerous Goods by Inland Waterways concluded at Geneva on 26 May 2000:
http://www.unece.org/trans/danger/publi/adn/adn_e.html

The transport of dangerous goods, regulated in Europe by the international agreements, mentioned in the last three points i.e. the ADR, RID and ADN have also been extended to national transport in the EU under the Inland transport of dangerous goods Directive, 2008/68/EC:
http://europa.eu/legislation_summaries/transport/rail_transport/tr0006_en.htm

The International Maritime Dangerous Goods (IMDG) Code covers the transport of dangerous goods by sea: 
http://www.imo.org/safety/mainframe.asp?topic_id=158

UN Recommendations on the Transport of Dangerous Goods, Model Regulations. These are updated every two years. Recommendations relevant to hydrogen are UN 1049 (Hydrogen, Compressed), UN 1066 (Hydrogen, refrigerated liquid) and UN 3468 (hydrogen in a metal hydride storage system):
http://www.unece.org/trans/danger/publi/unrec/12_e.html

Dangerous Substances Directive: 67/548/EEC:
http://ec.europa.eu/environment/chemicals/dansub/home_en.htm
http://eur-lex.europa.eu/JOHtml.do?uri=OJ:L:2009:011:SOM:EN:HTML

Low Voltage Directive (LVD) 2006/95/EC
http://ec.europa.eu/enterprise/sectors/electrical/lvd/
http://ec.europa.eu/enterprise/sectors/electrical/files/lvdgen_en.pdf

Electromagnetic Compatibility Directive (EMC) 2004/108/EC
http://ec.europa.eu/enterprise/sectors/electrical/emc/
http://ec.europa.eu/enterprise/sectors/electrical/files/emc_guide__updated_20100208_v3_en.pdf

Pressure Equipment Directive (PED) 97/23/EC
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/ped/index_en.htm
http://www.bsigroup.com/en/ProductServices/About-CE-Marking/EU-directives/Pressure-Equipment-Directive-PED/

Simple Pressure Vessels Directive (SPVD) 2009/105/EC
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/spvd/index_en.htm

Transportable Pressure Equipment Directive (TPED) 1999/36/EC
http://ec.europa.eu/transport/tpe/index_en.html

Gas Appliances Directive 2009/142/EC Includes fuel cells (where the primary function is heating)
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/gas_appliances/index_en.htm

Equipment and protective systems for potentially explosive atmosphere Directive (ATEX 95) 94/9/EC 
http://ec.europa.eu/enterprise/sectors/mechanical/atex/index_en.htm

Directive on minimum requirements for improving the safety and health protection of workers potentially at risk from explosive atmospheres (ATEX 137) 99/92/EC
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:31999L0092:en:NOT

Machinery Directive (MD) 2006/42/EC
http://ec.europa.eu/enterprise/sectors/mechanical/files/machinery/guide_application_directie_2006-42-ec-2nd_edit_6-2010_en.pdf
http://ec.europa.eu/enterprise/sectors/mechanical/machinery/

Seveso II Directive
http://ec.europa.eu/environment/seveso/index.htm

The integrated pollution prevention and control Directive (IPPC) 2008/1/EC
http://ec.europa.eu/environment/air/pollutants/stationary/ippc/summary.htm

Measures to encourage improvements in the safety and health of workers 89/391/EEC
http://europa.eu/legislation_summaries/employment_and_social_policy/health_hygiene_safety_at_work/c11113_en.htm

Personal protective equipment Directive 89/686/EEC
http://ec.europa.eu/enterprise/sectors/mechanical/documents/legislation/personalprotectiveequipment/

Japan has a national regulation in force covering fuel cell passenger cars with compressed hydrogen storage. An unofficial English version is available [63].
http://www.unece.org/trans/main/wp29/wp29wgs/wp29grsp/sgs_legislation.html

In the US, the (International Fire Code) and the International Building Code (IBC), both produced by the ICC, are most likely to have been adopted by the region.