Game of " Mountaineering specified under section 10
Notification No. 99 was published on 30 September 1975. Its subject is Game of " Mountaineering specified under section 10.
This notifies a named person, body, fund or instrument for the purpose of a provision. Nothing in it changes the provision itself.
In exercise of the powers conferred by sub-section (23) of section 10 of the Income-tax Act, 1961 (43 of 1961), the Central Government hereby specifies the game of " Mountaineering " for the purpose of the said section
Source: the Income Tax Department’s own published text — its page for this instrument.