The authority shall be nonprofit and no part of its net earnings remaining after payment of its expenses shall enure to the benefit of any individual, firm or corporation, except that if the board of directors of the authority determines that sufficient provision has been made for the full payment of the expenses, bonds and other obligations of the authority then any net earnings of the authority thereafter accruing shall be paid to the locality with respect to which the authority was created. However, nothing herein contained shall prevent the board of directors from transferring all or any part of its facilities or properties in accordance with the terms of any contract entered into by the authority.