Subject to the availability of appropriations to carry out this section, the Secretaries shall provide funds to support brown tree snake control, interdiction, research, and eradication efforts carried out by the Department of the Interior and the Department of Agriculture, other Federal agencies, States, territorial governments, local governments, and private sector entities. Funds may be provided through grants, contracts, reimbursable agreements, or other legal mechanisms available to the Secretaries for the transfer of Federal funds.