An appeals tribunal appointed by the PCB exonerated the duo of doping offences and lifted their long-term bans.
Pakistan are well on course for victory in the third and final Test against West Indies on Friday after reducing the tourists to 144 for four wickets at lunch.
President of the International Olympic Committee (IOC) Jacques Rogge said he did not see cricket being included in the Olympic Games in the near future.
Pakistan were 21 without loss at lunch, with their team still requiring 213 runs to avoid an innings defeat.