https://www.immigration.govt.nz/opsmanual/66762.htm SM1.5, 7 and 8.
The SMC JSV itself is an open visa, meaning that the holder can take whatever they are offered, skilled or not, which will help them support themself in NZ while they are looking for a skilled job in the career that they have proved in their application for residence under SMC.
Being granted the JSV means that you have "deferred Residence" - your residence (and that of everyone on your application) is waiting for you. As soon as you show INZ your offer of a skilled job, and they check that it matches the requirements,
https://www.immigration.govt.nz/opsmanual/66785.htm, the visa labels for Residence are added to everyone's passports. (See below* for more.)
The sequence of events in most cases would be that the JSV holder offered a skilled job starts working straight away, takes or sends the paperwork to the nearest INZ office (NOT the one that originally dealt with your case when you were offshore, but check with the INZ office and fees finder
https://www.immigration.govt.nz/new-...nd-fees-finder to see which one), works, covered by the JSV, while the INZ formalities are gone through, and receives his/her passport back with the Residence label in it when it is ready. Any partner and family still in their home country can take or send their passports to the INZ office covering where they are, and will get their Residence labels stuck in, with which they can travel to NZ.
*If the applicant has not worked in the skilled job for at least three months when they tell INZ about the job or offer, then their Residence visa label will have a Section 49(1) condition on it, that they must work in that job for three months. Having done that, still employed there, they go back to INZ with evidence of having met the condition (pay slips, financial and/or tax records), and they then get a Residence visa label with NO conditions.
https://www.immigration.govt.nz/opsmanual/66848.htm SM11.5 a and b. (Any partner and family's visa labels will have the same conditions, that is, their situation is dependent on the main applicant's job until s/he has carried out the conditions, and will get an unconditional label when s/he does.)