I am, therefore, in agreement with the contention of the learned counsel for the State that ad hoc service cannot be counted for the purpose of proficiency step up. In the present case, the services of the petitioners were regularized vide order (Annexure P/2). Although, in the said order, the dates of regularization of the services of the petitioners have been mentioned as 07.10.1976, 24.03.1977 and 03.10.1979. However, it is specifically stated in the written statement that the regularization was against the rules and the instructions issued by the State for regularization of service of ad hoc employees. It is admitted by the respondents that the services of the petitioners were to be regularized w.e.f. 01.04.1985 (Annexure R/1). Taking the date of regularization as 01.04.1985, the petitioners are entitled to proficiency step up on completion of 8 years service w.e.f. 1.4.1985. The view that I have taken is supported by the law laid down by the Hon'ble Supreme Court in the case of State of Haryana vs. Haryana Veterinary and Ahts Association and another, 2000(8) SCC 4, that it is only regular service which is to be counted for the purpose of grant of ACP scale.