For AI agents: read the machine-readable documentation index at /llms.txt or the single-file full reference at /llms-full.txt.
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New materials.

NYC Admin. Code § 28-113.3.4
in effect
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§ 28-113.3.4 New materials. New materials not provided for in this code, and any material of questioned suitability proposed for use in the construction of a building or structure, shall be subjected to the tests prescribed in this code or in the rules of the department to determine character, quality and limitations of use.
Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-156813Fetched: 10/24/2026

Starting a business in New York? New York LLC guide: costs and requirements

28-113.3.4 | Corpus