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213 Authority

A Postmaster has the authority to decide whether articles and substances other than written, printed, or graphic matter are nonmailable and, where appropriate, is authorized to refuse to accept for mailing such matter determined to be nonmailable. Postmasters may consult with the Pricing and Classification Service Center (PCSC) in making these determinations.

Pricing and Classification Service Center
90 Church St Ste 3100
New York NY 10007-2951
Telephone: (212) 330-5300 / Fax: (212) 330-5320