The phrase "section number" refers to a specific number assigned to a particular part or division of something, like a book, document, or area. It helps to organize and identify different sections for easy reference or navigation. Full definition
This is why I placed the title and section numbers in groups. (lawyerist.com)
Because we have multiple cohorts for many of our programs, please check the schedule carefully to be sure you know the correct section number before you register. (regent.edu)
You just need to scroll through their list of statute names and copy the URL provided, filling in the desired section number. (slaw.ca)