; (VI) for which the wage determination is based on a weighted or straight average of the relevant wages, or another valid measure of central tendency determined by the Secretary of Labor of relevant wage levels; and (VII) that identifies a statistically valid methodology that was used to collect the data. (D) Permit The Secretary shall provide each registered employer whose application submitted under subparagraph (A) is approved with a permit that includes the number and description of such employer’s approved registered positions at the time of such approval. (E) Registry of registered positions (i) Maintenance of registry The Secretary shall develop and maintain a registry of registered positions. (ii) Availability on website Such registry shall be accessible on a website maintained by the Secretary. (iii) Availability on State workforce agency websites Each workforce agency of each State shall be linked to such registry. (iv) Conditions of availability on website (I) Registered positions Each registered position shall be included in the registry of registered positions maintained by the Secretary and shall remain available for viewing on such registry throughout the period of approval under paragraph (5). (II) Availability and eligibility The Secretary shall ensure that the registry indicates whether each registered position in the registry is filled or unfilled. (2) Requirements (A) Eligible occupation Each registered position shall be for a position in an eligible occupation as described in paragraph (3). (B) Recruitment of united states workers (i) Requirements A position may not be a registered position unless the registered employer— (I) advertises the position for a period of 30 days, including the wage range, location or locations, and proposed start date— (aa) on the Internet website maintained by the Secretary of Labor for the purpose of such advertising; and (bb) with the workforce agency of the State where the position will be located