No open dumps shall be established and operated, nor any practice or disposal of solid waste by any person, including LGUs, which constitutes the use of open dumps for solid wastes, be allowed after the effectivity of this Acts: Provided, That within three (3) years after the effectivity of this Act, every LGU shall convert its open dumps into controlled dumps, in accordance with the guidelines set in Sec. 41 of this Act: Provided, further, That no controlled dumps shall be allowed five (5) years following the effectivity of this Act.