Section 6
SEC. 6. In the event of the death of a purchaser prior to the complete payment of the price of the lot purchased by him, his widow and children shall succeed in all his rights and obligations with respect to his lot. In the event said purchaser or his successors in interest should fail to pay six consecutive or cumulative installments on the purchase price and the interest thereon or on any installment, when and as the same mature, it shall be the duty of the Chairman of the Land Tenure Administration at once to bring suit for the recovery of such installments and interest due, or of the total amount of the purchase price unpaid, with interest thereon, and also to enforce the lien of the Government against the lot by selling the same in the manner provided by law for the foreclosure of mortgages: Provided, That only persons who do not own any residential lot in the cities of Manila, Quezon, Pasay, or their suburbs and are qualified to acquire public lands, can take part in the sale by auction. In the event of such sale the purchaser at such sale shall acquire a good and indefeasible title.