On a bare reading of the above quoted Regulation 6, it is clear that the Commission is empowered to take a preliminary test or examination for screening of candidates with the prior approval of the Government. Sub-regulation (5) of the Regulation 6, in fact, goes on to state that notwithstanding anything contained in relevant service rules or government orders regarding recruitment, the Commission may hold preliminary examination/ screening test for finding out suitable candidates for admission for main examination or interview, as the case may be. Sub-regulation (6) of Regulation 6 says that the preliminary examination shall mean screening test to be conducted by the Commission with the purpose of finding out suitable candidates in required proportion as fixed by the Commission in each category, reserved and unreserved for admission to the main examination or interview, as the case may be. Sub-regulation (7) of Regulation (6) says that preliminary examination shall be conducted in the manner prescribed in the Uttar Pradesh Direct Recruitment through Public Service Commission Preliminary Eligibility Test Rules, 1986 as amended from time to time, which is deemed to be adopted for the said purpose. The marks obtained by the candidates in the preliminary examination/ screening test shall not be counted for determining final order of merit.