Special rules of order

A special rule of order is parliamentary procedure term for a rule adopted by the organization that relate to procedure or to the duties of officers within meetings.

Special rules of order (with a few exceptions) supersede the rules in an adopted parliamentary authority such as Robert's Rules of Order. These rules continue in existence from one meeting to the next.

Special rules can be adopted by a two-thirds vote with previous notice or a majority of the entire membership of the group. In conventions, a mixture of standing and special rules that are adopted at the start of the convention are called "convention standing rule" in RONR. These, when adopted as a "package" generally require a two-thirds vote.

The Standard Code of Parliamentary Procedure (TSC), refer to these types of rules as "standing rules", and do not require a simple majority vote without previous notice. One of the most common types of these rules is the rule to set limits on the amount of time, or the number of times, a member may speak in debate or to prohibit some type of motion.

...
Wikipedia