The Government of the Virgin Islands does hereby pledge to, contract and agree with, any person, firm or corporation, or any Federal, Virgin Islands or state agency, subscribing to or acquiring bonds of the Authority or of the Government of the Virgin Islands issued for the purposes of this chapter, that it obligates itself not to limit or alter the rights or powers hereby vested in the Authority or the Government, as the case may be, until all such bonds at any time issued, together with the interest thereon, are fully met and discharged. The Government of the Virgin Islands does further pledge to, contract and agree with, any Federal agency that in the event any such agency shall construct, extend, improve, or enlarge or contribute any funds for the construction, extension, improvement, or enlargement of, any facilities, the Government of the Virgin Islands will not alter or limit the rights or powers of the Authority in any manner which would be inconsistent with the continued maintenance and operation of such facilities or the extensions, improvement, or enlargement thereof, or which would be inconsistent with the due performance of any agreements between the Authority and any such Federal agency; and the Authority shall continue to have and may exercise all rights and powers herein granted so long as the same shall be necessary or desirable for the carrying out of the purposes of this chapter and the purpose of any Federal agency in constructing, extending, improving or enlarging, or contributing funds for the construction, extension, improvement or enlargement of, any facilities.