N.Y. Comp. Codes R. & Regs. tit. 9, § 2523.4
(c) Except for complaints pertaining to heat and hot water or other conditions requiring emergency repairs, before filing an application for a reduction of the legal regulated rent pursuant to subdivision (a) of this section, a tenant should notify the owner or the owner's agent in writing of all the service problems listed in such application. A copy of the written notice to the owner or agent with proof of mailing or delivery should be attached to the application. Applications should be filed with the DHCR no earlier than 10 days after such notice is given to the owner or agent. Failure to provide such prior written notice will not be grounds for dismissal of the application. Applications based upon a lack of adequate heat or hot water must be accompanied by a report from the appropriate city agency finding such lack of adequate heat or hot water.
(d)
(e) Certain conditions complained of as constituting a decrease in a required service may be de minimis in nature, and therefore do not rise to the level of a failure to maintain a required service for the purposes of this section. Such conditions are those that have only a minimal impact on tenants, do not affect the use and enjoyment of the premises, and may exist despite regular maintenance of services.
The following schedule sets forth conditions that will generally not constitute a failure to maintain a required service. However, this schedule is not intended to be exclusive, and is not determinative in all cases and under all circumstances. Therefore, it does not include all conditions that may be considered de minimis, and there may be circumstances where a condition, although included on the schedule, will nevertheless be found to constitute a decrease in a required service.
Schedule of De Minimis Conditions Building-Wide Conditions
25. Windows—sealed, vented, basement or crawl space windows, other than in areas used by tenants (e.g., laundry rooms); cracked fire-rated windows; peeling paint or other nonhazardous condition of exterior window frames.
Individual Apartment Conditions
(f) In determining whether a condition is de minimis, the DHCR may consider the passage of time during which a disputed service was not provided and during which no complaint was filed by any tenant alleging failure to maintain such disputed service, as evidencing that such service condition is de minimis, and therefore does not constitute a failure to maintain a required service, provided that:
(2) services required to be provided by laws or regulations other than the RSL and this Code shall not be subject to this subdivision.
(g)
(a)