When a district for the maintenance of the permanent poor is constituted as provided in this chapter, the respective counties and the municipalities therein, excepting those municipalities which as authorized in section 44:1-61 of this title have elected not to participate in the county purpose, shall no longer provide and maintain almshouses or welfare-houses for the relief and maintenance of the permanent poor, and the real and personal property which has been so used may be disposed of in like manner and for like purposes as is authorized in section 44:1-64 of this title.