It sounds like you are starting from scratch so don't have any specific rules to follow yet (as opposed to if you were writing replacement by-laws and still under the jurisdiction of the old ones). I'd think any reasonable passage would be acceptable. (i.e., majority vote of those present.) Since by-laws are your fundamental foundation, I'd suggest voting them in at the General Meeting rather than just presenting them.

We have written our Bylaws for a new school.
Do we have to present them in any special way or do we just adopt them at our next Executive Meeting and then present them to the general membership at our first General Meeting?