predicated on a standard 15% increase, and not on a fact in doubt or in dispute. There was no section 36 dispute referable to this increase, and therefore the Division’s order is not authorized under section 36.
(Matter of Epstein v Herman, supra.) Certain of the maxima set for dates after November, 1968, were determined on the basis of improvements. However, section 36 only authorizes the establishment of a maximum as of May 1,1950, or the date of first renting. It does not authorize the establishment of a maximum rent for later dates. There is, in fact, no provision in either the State Residential Rent Law or in the State Rent and Eviction Regulations which explicitly applies to the facts of this case. The Division is not, however, thereby precluded from issuing the order in question. The Division has been given broad discretionary powers by the Legislature. It may issue “such rules, regulations and orders as it may deem necessary or proper to effectuate the purposes of this act”, provided that such rules, regulations and orders are “designed to maintain a system of rent controls at levels which * * are generally fair and equitable” (State Residential Rent Law, § 4, subd 4, par [a]; subd 6). While it may be preferable that the Division fulfill its discretionary function by promulgating quasi-legislative regulations (cf.
Matter of 89 Christopher v Joy, 35 NY2d 213 , 218), there is no rigid requirement to this effect. “[T]he choice made between proceeding by general rule or by individual,
ad hoc litigation is one that lies primarily in the informed discretion of the administrative agency”
(Securities & Exch. Comm, v Chenery Corp., 332 US 194 , 203; see
National Labor Relations Bd. v Bell Aerospace Co., 416 US 267 , 290-295). This is not to say that there cannot be instances where the agency may abuse its discretion. Nothing in this case, however, suggests an abuse. The Division has essentially determined that where a landlord is innocently unaware of the rent control status of his property and his tenant enters into an agreement establishing a rent higher than the registered maximum, the Division has the authority to reappraise the maximum for the period in question. This is a fair and equitable result, and indeed “effectuates the purpose of this act” (see State Residential Rent Law, § 1, subd 1).
Matter of Epstein v Herman ( 19 AD2d 74 ,
supra) is not to the contrary. In that case the landlord was fully aware of the property’s rent control status. It would have been contrary to the purpose of the act to reappraise the maximum rent when, knowing the property was subject to rent control, the landlord neglected for years to apply for an increase or a reevaluation (cf. State Residential Rent Law, § 11, subd 2). The effect of the Division’s determination is not, as appellant claims, a retroactive rent increase in violation of the State Residential Rent Law (§ 4, subd 6). Rather, it is a determination of a previously unestablished fact: what would the maxima have been if the landlord had properly applied for rent increases (cf.
Matter of Austreal Corp. v McGoldrick, 305 NY 848 ). The Division has not ordered the tenant to pay anything for dates prior to the date of the issuance of its order or even for subsequent periods. The rental agreement, past payments pursuant to that agreement, and value for the use and occupancy of the premises, are the bases for the claims between the tenant and the landlord (see
Thompson Props, v Di Biase, 57 Mise 2d 1085). The maxima set by the Division simply determines the limits of those claims. Following the Division’s determination, the Mount Vernon City Court quite properly granted the landlord partial summary judgment for the tenant’s use and occupancy for the period the action was pending. The City Court erred, however, by applying the figure of $241.43 per month. That figure had been reduced by the Division to $234.93. We modify the judgment of the City Court, accordingly. Gulotta, J. P., Thompson, Brown and Niehoff, JJ., concur.