NAFTA is an example of protection via expanded eligibility.

The North American Free Trade Agreement (NAFTA) is a general trade agreement between Canada, Mexico and the United States that imposes general requirements for both the domestic and international treatment and enforcement of intellectual property rights.

NAFTA significantly advances protection of intellectual property in Mexico. However, it also requires that the United States and Canada make certain changes. The agreement recognizes the need, at a minimum, to accede and give effect to the main international conventions relating to intellectual property, i.e., the Paris Convention (intellectual property), the Berne Convention (copyrights), the Geneva Convention (protects phonograms or audio works), and the Union for the Protection of New Varieties of Plants (UPOV).

Under the UPOV, protection is given to plant varieties that: -- belong to one of the botanical species on the national list; -- are distinct from commonly known varieties; -- are sufficiently homogeneous; and -- are stable.

In essence, NAFTA requires each member country to extend protection to foreign nationals equivalent to the protection granted to domestic right holders.