The rehabilitation contracts require the operators to rehabilitate the quarries within a specified period,in return for the granting of rights to process and sell surplus rock excavated during the course of the works.

• 复修合约规定，采石商须于指定时间内复修石矿场，以换取采石权，把石矿场复修期间所挖掘的剩余石料加工出售。