Articles 315 to 323 of the Indian Constitution contain provisions regarding the Union Public Service Commission (UPSC). These articles outline the establishment, composition, and functions of the UPSC, which is responsible for conducting civil service examinations and selecting candidates for various government positions.

Article 315: This article deals with the establishment and composition of the UPSC. It states that there shall be a UPSC for the Union, which shall consist of a Chairman and other members appointed by the President of India.

Article 316: This article deals with the appointment and term of office of the Chairman and members of the UPSC. It states that the Chairman and members shall hold office for a term of six years or until they attain the age of 65 years, whichever is earlier.

Article 317: This article deals with the removal and suspension of the Chairman and members of the UPSC. It states that they can be removed or suspended from office by the President on the grounds of misbehavior or incapacity.

Article 318: This article deals with the power and functions of the Chairman of the UPSC. It states that the Chairman shall be the chief executive authority of the UPSC and shall exercise such powers and perform such functions as may be prescribed by the President.

Article 319: This article deals with the regulation of recruitment and conditions of service of persons appointed to public services and posts in connection with the affairs of the Union or any State. It states that the UPSC shall be consulted on all matters relating to the recruitment and conditions of service of such persons.

Article 320: This article deals with the functions of the UPSC. It states that the UPSC shall be consulted on the following matters:
1. All matters relating to the recruitment to civil services and posts.
2. The principles to be followed in making appointments to civil services and posts.
3. The suitability of candidates for appointment to civil services and posts.

Article 321: This article deals with the power of the UPSC to regulate its own procedure. It states that the UPSC shall have the power to regulate its own procedure and conduct its business.

Article 322: This article deals with the expenses of the UPSC. It states that the expenses of the UPSC, including the salaries, allowances, and pensions of the Chairman and members, shall be charged on the Consolidated Fund of India.

Article 323: This article deals with the administrative tribunals. It states that Parliament may, by law, provide for the establishment of administrative tribunals for the adjudication of disputes and complaints with respect to recruitment and conditions of service of persons appointed to public services and posts. The UPSC may be consulted in the appointment of members of such tribunals.

In conclusion, Articles 315 to 323 of the Indian Constitution contain provisions regarding the UPSC, outlining its establishment, composition, functions, and powers. These articles ensure that the UPSC plays a crucial role in the recruitment and selection of candidates for civil services and posts in the Union government.