有一个网页说:have been nominated by an employer who is willing to employ you to work full-time in an occupation listed on the Employer Nomination Scheme Occupation List (ENSOL) for at least three years
意思是提供担保的公司要雇用被担保人至少3年。
另一个网页说:have your skills assessed as suitable for the nominated position by the relevant skills assessing authority. A list of assessing bodies can be found in the ENSOL and
unless exceptional circumstances apply, have at least three years full-time work experience in the occupation before the visa application is lodged