The general conditions are often a standard form. The supplementary conditions adapt that form to the owner, the project and the state.
Typical subjects are insurance limits, bond requirements, retainage, wage rules, liquidated damages and payment timing.
Read them before you price. A sub who skips them can miss an insurance requirement that adds real cost. Many terms flow down to subs.
This glossary is not legal advice. If a term is unclear or looks unusual, ask your insurance agent, your bonding agent or your attorney.