What level of government has primary policymaking responsibility for setting the requirements for receiving a high school diploma?

Which level of government that has the primary responsibility for establishing the requirements to receive a high school diploma is the state government.

The State should prioritize high school education, but also act, in partnership with municipalities, in the provision of middle school education

there are many ways of getting involved on your local party. attached you will find the brochure that describes some ideas: go ahead and visit your local hq, become a volunteer on your comnunity or struggle up for your own ideas so you can make them real.