N.Y. Comp. Codes R. & Regs. tit. 7, § 712.5 – Source of publication.

(a) Books, magazines and periodicals received from other than the publisher may be delayed through the package room up to six days while being subject to media review guidelines. All material is subject to media review guidelines.
(b) Newspapers may only be received from the publisher or an approved distributor, subject to media review guidelines.
1. (1) No more than five newspaper clippings or five pages of printed or photocopied materials including materials printed off of the internet may be received from other than the publisher within a piece of regular correspondence.
2. (2) The pages or clippings must not be taped, glued, or pasted together or to other papers.
3. (3) Correspondence which includes printed or photocopied materials may be delayed through the correspondence unit up to six days while subject to media review guidelines.
  (d) Audio tapes.
4. (1) Audio tapes (cassettes), commercially made and sealed in cellophane or similar material, may only be received from a distributor, retailer or manufacturer, and are subject to media review guidelines.
5. (2) Religious tapes may be received from a bona fide religious organization. These tapes must be in clear packaging and be reviewed by the chaplain's office or media review committee.
(c) Printed or photocopied materials.