Actuarial valuation under AS15 (revised, 2005) is applicable (in its entirety) for:
1. Listed companies
2. Banks/FIs/Insurance companies, whether listed or unlisted
3. Companies with turnover >50 crores
4. Companies with borrowings >10 crores
5. Companies employing more than 50 employees
Companies that do not fall into any of the above categories also need to get actuarial valuation done, albeit with some flexibility. In short, all companies will need to consult an actuary to ascertain the applicability and/or extent of actuarial valuation needed.
Trust this will suffice!