1784.20Sec. 4601. Extension of returning worker exemption to H–2B numerical limitation. 1787.1..Sec. 4602. Other requirements for H–2B employers. 1789.5..Sec. 4603.Executives and managers.1790.5..Sec. 4604.Honoraria1791.18Sec. 4605. Nonimmigrants participating in relief operations. 1792.17Sec. 4606. Nonimmigrants performing maintenance on common carriers.