Are there rules that govern procedures of 501(c) (3)?

I am part of a 501c (3) which just elected a board of directors. The election featured a number of strange circumstances. Checking the bylaws to figure out what should happen made things worse – essential rules are omitted and other rules are contradicted.

Is there any overarching set of __internal__ procedural rules that, by law, our organization must follow?

I am not concerned with the activity of our organization outside of elections and meetings. I know there are many rules about what the organization must and cannot do. That’s not what I’m asking.

We are incorporated in California.