23-731 - Applicability LAST AMENDED 12/5/2024 The optional provisions for #sky exposure plane buildings# set forth in Section 23-73, inclusive, may be applied to #zoning lots# in R6 through R10 Districts without a letter suffix, except that such alternative provisions shall not apply to: (a) #zoning lots# in R6-1, R6-2, R7-3 and R9-1 Districts; (b) #zoning lots# in R8 Districts without a letter suffix in the portion of Community District 9 in the Borough of Manhattan located north of West 125th Street; or (c) #zoning lots# located in the #Limited Height Districts#.