There's plenty of work that goes into writing bylaws, so let's break down what you need to get writing! Research. Form a committee. Create the structure. Outline your organization's key roles and responsibilities. Establish your meeting rules. Define your membership. Address finances. Outline the amendment process.
Does Pennsylvania Require Corporate Bylaws? Pennsylvania's statute's don't explicitly state that you need corporate bylaws. However, Pennsylvania Consolidated Statute § 1310 implies the necessity of bylaws by stating that an organizing meeting “shall be held… for the purpose of adopting bylaws.”