Section 1. In the exercise of its functions to regulate the real estate trade and business and in addition to its powers provided for in Presidential Decree No. 957, the National Housing Authority shall have exclusive jurisdiction to hear and decide cases of the following nature:
Unsound real estate business practices;
Claims involving refund and any other claims filed by subdivision lot or condominium unit buyer against the project owner, developer, dealer, broker or salesman; and
Cases involving specific performance of contractual and statutory obligations filed by buyers of subdivision lot or condominium unit against the owner, developer, dealer, broker or salesman.