9. The undisputed fact is that the Petitioners were given appointment only on undertaking given by them pursuant to an advertisement by the Respondents. In the undertaking which was made to be furnished by the Petitioners, they were made to undertake that their appointment would be till the posts are filled up by regular/contractual appointment. This by itself clearly gives an indication that unless the Respondents fill up the sanctioned vacant posts by either regular recruitment or by way of contractual appointment, the Petitioners would continue as Guest Lecturers. On the practical aspect also the fact that the Petitioners are discharging the duties of Guest Lecturers for last more than 1-2 years, itself is a good ground for permitting the Petitioners to continue on the said posts as Guest Lecturers, simply for the reason of their experience on the said post, as fresh recruitment would mean that persons with no or less experience would be participating in the recruitment process, which also would not be in the interest of the students who are undertaking training in the respective institutions.