Can someone explain to me what are Division 1 general requirements of the project specifications?

Here are some extracts I can read: 
Consider how CW M plan requirements, or the requirement to write a plan, can be included in
specification documents under Division 1, General Requirements.

Include performance requirements or sole-source compliant products as applicable to the selected
option(s) in the project specifications. To ensure compliant purchases, consider creating a Division 1,
General Requirements, specification for sustainability criteria that meet MR requirements. Reference
that section to distinguish it from other sections that cover products and materials.