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If you hold an Essential Skills work visa, you can request a variation of conditions only if:
Your employer is changing, but your role and the location of employment remain the same; or
Your new position is on one of the Essential Skills in Demand Lists and you meet the requirements of the list.
E3.26.1.1 Varying Essential Skills work visa conditions
a. Essential Skills work visa holders seeking to change occupation or place of employment will not be granted a variation of conditions and must instead apply for a new work visa, unless:
i.their new occupation is listed on an Essential Skills in Demand list; and