1. Well, ad hoc appointments since often give rise to nepotism and corruption is disdained by the court of law.

2. If it si stop gap arrangements then it can be done but it must fulfil the minimum criteria for the post of Principal.

3. it is true that seniority alone is not the sole factor in promotion as along with the skill plays no less an important role.

4. however for such supersession the minimum criteria for promotion can not be overlooked.

So refer to the Service Rules of the University for this.

Ad hoc principal should meet the minimum prescribed qualifications required for appointment as principal in govt aided intermediate college

In case person who is not qualified is appointed second senior most person should complain to govt against appointment of unqualified person as ad hoc principal

2) if necessary take legal proceedings to challenge the appointment

The imposition of costs of suit is discretion of the court and it is exception than a rule. Even if the csots is allowed it is mostly token amount.

1)you have to bear the cost of legal proceedings

2) in legal porceedings taken by you costs can be claimed but it is discretion of court to award you costs

The adhoc appointment is temporary and it may continue till a permanent appointment is made. For this if a senior most lecturer is chosen, that may be due to the alternate choice of the management.

What should 2nd senior most lecturer do, who fulfil the required minimum qualifications to be appointed as ad hoc principal?

He can challenge the appointment on the basis of the reason he relies on that the appointment of the present incumbent is not proper and legal.

He can even approach court with a writ petition against the management

Can the authorised controller of an intermediate college be responsible for approval of filling substantive vacancy of principal by transfer

It depends that if had been empowered with this power to make such decision by the competent authority.

Who will bear the cost of legal proceedings when authorised controller is making illegal appointment of an ad hoc principal in government aided intermediate college?

The cost of the legal proceeding s will be borne by the person who is challenging this appointment which he/she considers it to be illegal.