; and (ii) is not an excluded occupation under subparagraph (B). (B) Occupations requiring college degrees An occupation that is listed in the Occupational Outlook Handbook published by the Bureau of Labor Statistics (or similar successor publication) that is classified as requiring an individual with a bachelor’s degree or higher level of education may not be an eligible occupation. (C) Publication The Secretary of Labor shall publicize the eligible occupations, designated as zone 1 occupations, zone 2 occupations, or zone 3 occupations, on an ongoing basis on a publicly available Internet website. (4) Filling of vacancies If an H–2C nonimmigrant terminates employment in a registered position or is terminated from such employment by the registered employer, such employer may fill that vacancy by hiring an H–2C nonimmigrant other than an initial H–2C nonimmigrant. (5) Period of approval (A) In general Except as provided in subparagraph (B), a registered position shall be approved by the Secretary for a period that begins on the date of such approval and ends on the earliest of— (i) the date the employer’s status as a registered employer is terminated; (ii) 3 years after the date of such approval; (iii) 240 days after the date of such approval if such position has not been filled by an H–2C nonimmigrant at any point during such time