; and (C) unless impracticable, provide for the designation of at least 2 Regional Depository Libraries in each census region. (2) Consultation In establishing regulations under paragraph (1), the Superintendent shall consult with Selective Depository Libraries and Regional Depository Libraries. 1746. Preservation Depository Libraries (a) Preservation Depository Libraries described A library which is designated as a Federal Depository Library may, at its request, be designated as a Preservation Depository Library if the Library enters into an agreement with the Superintendent of Documents to assist the Superintendent with the preservation of information dissemination products in the national collection under subchapter B. (b) Location of products Under an agreement under this section, a Preservation Depository Library may preserve IDPs (regardless of form or format) by housing them at its own location or by coordinating and managing all or part of collections of IDPs which are housed at other Federal Depository Libraries. (c) Preservation agreements with other entities In addition to designating Preservation Depository Libraries under this section, the Superintendent may enter in agreements with other entities to assist the Superintendent with the preservation of information dissemination products in the national collection under subchapter B. (d) Regulations The Superintendent shall carry out this section in accordance with regulations promulgated under this subchapter. Under such regulations, the Superintendent shall seek to designate Preservation Depository Libraries in a manner which promotes geographic diversity. 1747. Procedures for designation (a) In general The Superintendent of Documents may designate a library as a Federal Depository Library under this subchapter if the Library provides the Superintendent (at such time and in such form as the Superintendent may require) such information and assurances as the Superintendent may require to determine that the library will meet the applicable requirements