482TSS Short-term How many years experience is required for chef/cook?

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I am posting this on behalf of my husband, who is a pastry chef & Baker. 

His employer is happy to offer him sponsorship, however, we get confused by the experience requirement. 

His employer consulted an MA,  she says,  the visa requirement for TSS is 2 years full-time (or equivalent part-time), BUT,  chef/cook occupation needs 3 years full-time experience to gain a positive skill assessment. 

Is that true?  Can anyone explain further for skill assessment for us, please? 

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Additionally,  

if 3 years full-time experience is needed to gain a positive outcome of skill-assessment. Then, whoever passes the skill-assessment could opt to 189/190 visa. Who gonna apply for 482 visa which is a tempory visa and no pathway to PR in short-term list occupation.   Or alternatively, 187 RSMS visa. 

[VERYSTORMY]

It is because not every occupation requires a skills assessment for a 482. Some do and some don't, if your husbands does, then it is the requirements of the skills assessment that matters. 

The reason people still apply for a 482, is because not everyone eligible for a 482 is eligible for another visa. For example, if it is only on the short term list, then that rules out 189. A 190 would require state sponsorship and the state's may not be sponsoring that occupation or apply further requirements, for example WA will only sponsor most occupations if the applicant has studied there.