The salary and allowances of the Chief Minister of a State are determined by…

Article 164(5) of the Constitution of India provides that the salaries and allowances of the Chief Minister and other Ministers of a State shall be such as the Legislature of that State determines by law from time to time.

Applying this to the item: the power to fix the salary and allowances of a State's Chief Minister rests with the State Legislature, which enacts a specific Salaries and Allowances of Ministers Act for the purpose - so the State Legislature is the body described in the question.

• State Pay Commission - only recommends pay scales/allowances for state government employees; it holds no independent law-making power to fix a Minister's remuneration.

• Parliament - fixes salary and allowances for Union-level office-holders (e.g., the President, Vice-President, and Union Ministers under Article 75(6)); it has no law-making competence over a State Chief Minister's remuneration.

• Governor of the State - appoints the Chief Minister under Article 164(1) and gives assent to laws passed by the Legislature, but does not itself fix the salary figure.