Explain the difference between IBC and NYS Building Code in interior design practice.

• A. IBC is the model code; local amendments do not apply.
• B. NYS Building Code is identical to IBC.
• C. IBC is the model code; state and local amendments (like NYS or NYC codes) may modify requirements; designers must comply with adopted local codes.
• D. The IBC applies only to residential buildings.

Answer: (C)

The essential idea is that the IBC is a model code used to establish baseline safety rules for buildings, but it isn’t law by itself. States and local jurisdictions adopt the model code and may add amendments to fit local conditions, enforcement practices, or policy goals. In New York, the NYS Building Code is the state-adopted version that uses the IBC as its foundation but includes state-specific amendments. In practice, interior designers must design to the edition and amendments that are actually in effect for the project’s location, and in many places like NYC there are additional local requirements on top of the state code. So the key difference is that the IBC provides the general standards, while the NYS Building Code reflects the officially adopted rules—plus any local amendments—that must be complied with for permit approval and construction.