You can get a special certificate from important people in the government. These people are the Secretary of Foreign Affairs and Trade or a Deputy Secretary of Foreign Affairs and Trade. They can sign a certificate that tells you about certain countries and their agreements.

The certificate can say two main things:

1. It can tell you if a country is part of a group called 'Contracting States' on a specific day or time period.

2. It can tell you if a country has made a special announcement (called a declaration) about two agreements. These agreements are called the Cape Town Convention and the Aircraft Protocol. The certificate will say what the announcement was about.

If you get one of these certificates, you can trust that everything it says is true. The law says that the certificate is proof of all the information it contains, no matter what you're using it for.