If State funds are available for paying indemnity, the Department shall pay to the owner of each infected animal an indemnity of $50 for any grade animal and $100 for any registered animal, except that steers so destroyed shall not be eligible for indemnity unless the Department approves depopulation of the entire herd. The Department may, by regulation, increase the indemnity payments, or include additional classes of cattle in order to facilitate the program for eradication of brucellosis. Registration certificates covering animals registered with an approved registry association shall be presented before payment of indemnity, otherwise indemnity payment shall be made as grade. A reasonable length of time will be allowed for the registration of eligible animals that are under 3 years of age.