What are the roles and responsibilities of a Public Service Commission according to this rule?
The roles and responsibilities of a Public Service Commission according to this rule are:

1. To advise on any matter referred to them regarding claims for payment of costs incurred by a person serving under the Government of India or the Government of a State, in defending legal proceedings against acts done in execution of their duty.
2. To advise on any claim for the award of a pension in respect of injuries sustained while serving under the mentioned governments.
3. To advise on the amount of any such award.
4. The President may refer other matters to them concerning the all-India services and other services and posts related to the affairs of the Union.
5. The Governor may refer other matters to them concerning services and posts related to the affairs of a State.
6. However, the President and Governor can make regulations specifying certain matters where it is not necessary for a Public Service Commission to be consulted.