Firstly you are bound to submit and Expression of Interest (EOI) in the SkillSelect expression your interest to apply for this Subclass 491 visa. SkillSelect will calculate your points score based on the information provided by you in EOI. If your score is at least 65 then you will be invited to apply.
If you indicated to be nominated, then your score will be visible to the state or territory government agencies and if them find you eligible, then will send you an invite to apply.
Your completed EOI is stored in SkillSelect and is valid for 2 years. You can update for any changes in the EOI as and when needed.
If invited to apply for visa, you will also receive an invitation from SkillSelect. You are required to submit all the necessary documents as evidence to support your identity, English skill levels, sponsor, skill assessment, relationship, character etc. to prove you meet all the specified eligibility criteria.
You have a period of 60 days from the date of invitation to apply for a valid visa online. Ensure that you do so before the invitation expires.