If you get a certificate from the Board, it is proof of what it says, unless someone can show it is wrong. The certificate can say things like whether a standard or notice has been issued, changed, or cancelled. It can also say when a standard or notice starts or stops being used, or if it is currently in use.

You can trust a certificate from the Board as proof of these things, as long as no one can show it is incorrect. This is helpful because it means you do not need other proof, just the certificate. The Board's certificate is enough evidence, according to the law, which you can learn more about by looking at the related legislation.