; (D) contain standard definitions for different speed tiers, such as the 2G, 3G, 4G, and 4G LTE tiers and the equivalent for fixed broadband internet service; (E) ensure that the collection and validation process occurs on a regular basis; and (F) establish a standardized ongoing validation process and public feedback mechanism that will allow for consumers, State and local officials, and broadband internet service providers to submit data to the Commission to verify coverage data from broadband internet service providers and challenge any aspects of such data believed to be inaccurate. (2) Considerations In promulgating the rule required under paragraph (1), the Commission shall consider— (A) coordinating with the Postmaster General, the heads of other Federal agencies that operate delivery fleet vehicles, and the Director of the Bureau of the Census for assistance with data collection and the feasibility of using more granular address level data; and (B) creating 1 centralized national map with multiple layers, including a layer each for fixed broadband internet service and mobile broadband internet service, which may be used in determining eligibility for all Federal broadband internet service grant, loan, and subsidy programs. (3) Establishment of Office The Commission shall establish an Office of Broadband Data Collection and Mapping within the Commission to serve as the central point of collection, aggregation, and validation of data collected under the standardized methodology established under this subsection. (b) Technical assistance program (1) In general The Assistant Secretary shall establish a technical assistance program under which the Assistant Secretary shall provide grants to State and local entities, such as regional planning organizations, to— (A) assist such entities with mapping and the development of a GIS-based map of existing fixed broadband internet service and mobile broadband internet service