First, it was contended that such lifers were entitled to have their cases for pre mature release considered by the concerned authorities on completion of ten years of sentence inclusive of remissions in the case of a female prisoner or a male prisoner of under 20 years of age at the date of the commission of the offence or completion of 14 years of sentence inclusive of remissions in the case of adult prisoners under Para 516 B of the Punjab Jail Manual but since November, 1971 the authorities concerned are not submitting their cases for such consideration until actual substantive imprisonment has been undergone for 6 years in case of female prisoners and prisoners below 20 years at the date of the commission of the offence and 8 years in case of adult prisoners and in that behalf certain executive instructions issued by the Punjab Government on 6th August, 1971 are being relied upon but according to the counsel for the lifers such executive instructions issued in 1971 cannot affect the right conferred upon the lifers under Para 516 B which has the force of a statutory rule and Statutory Rules cannot be amended or altered by any executive instructions; hence the lifers concerned in these matters are entitled to have their cases considered for pre mature release since they satisfy the requirements of Para 516 B of the Punjab Jail Manual.