We had a by-law drawn up covering bathrooms and internal plumbing. It took quite a while going back and forth to the lawyer, back to the EC etc etc. It was necessary to ensure that the correct terminology and wording was used for our complex.
We also had cause to contact a strata lawyer regarding an owner who had breached strata by-laws (damaging/changing common property on numerous occasions and refusing to return back to original condition). It also took a long time before we had a document with the correct wording and referring to the correct areas of common property. It was about 5 weeks at least in this instance.
In both instances, the time was worth it. You really do need to read, re-read to make sure it is right. The wrong wording and you are back to the drawing board.