Prime Minister Oath is mentioned in 3rd Schedule,The third Schedule contains the following Oaths:
1. Oath of office for the minister for the union.
2. Oath of secrecy for the minister for the union.
3. Oath of affirmation to be made by a member of parliament
4. A form of oath to be made by a judge of the supreme court
5. A form of oath to be made by the comptroller and audit general of India
6. A form of oath for a minister of state
7. A form of oath of secrecy for a minister for a state
8. Oath of affirmation to be made by a candidate for election to the legislature of a state
9. Oath to be made by a member of a legislature of the state.
10. A form of oath to be made by a judge of the high court.