Both statements 1 and 2 are correct.

Statement 1 states that the Planning Commission decides on how to annually raise resources for financing the Five-Year Plans through taxes and non-tax revenues. This is accurate as the Planning Commission is responsible for determining the financial requirements of the Five-Year Plans and developing strategies to raise the necessary funds through various means, including taxes and non-tax revenues.

Statement 2 indicates that the Planning Commission works on the detailed plan implementation mechanism. This is also true as the Planning Commission plays a crucial role in formulating and implementing the Five-Year Plans. It develops the detailed plan of action, allocates resources, and monitors the progress of plan implementation.

Therefore, both statements 1 and 2 are correct, and option 3 is the correct answer.