; or (iii) the actual wage level paid by the employer to all other individuals with similar experience and qualifications for the specific employment in question. (B) Alternate wage payment systems An employer can utilize a piece rate or other alternative wage payment system so long as the employer guarantees each worker a wage rate that equals or exceeds the amount required under subparagraph (A) for the total hours worked in each pay period. (k) Nondelegation The Department of Agriculture and the Department of Homeland Security shall not delegate their investigatory, enforcement, or administrative functions relating to this section to other agencies or departments of the Federal Government. (l) Compliance with bio-Security protocols Except in the case of an imminent threat to health or safety, any personnel from a Federal agency or Federal grantee seeking to determine the compliance of an employer with the requirements of this section shall, when visiting such employer’s place of employment, make their presence known to the employer and sign-in in accordance with reasonable bio-security protocols before proceeding to any other area of the place of employment. (m) Limitation on H–2C workers’ stay in status (1) Maximum period The maximum continuous period of authorized stay as an H–2C worker is 36 months. The employer shall file any petition to extend the period of authorized stay for such H–2C worker not later than 6 months before the expiration of the period of authorized stay. In addition to the maximum continuous period of authorized stay, an H–2C worker may also be present for a period of not more than 7 days prior to the beginning of authorized employment as an H–2C worker for the purpose of travel to the place of employment. Notwithstanding the duration of the employment requested by the employer petitioning for the admission of an H–2C worker, if the alien is granted a visa, at the request of the alien, the term of the visa shall be for the maximum period described in this subsection, except that