Everyone, including the family members, who haven't landed yet, have to land 'on or before' the last day of the Visa Expiry.
The 'expiry date' of the visa/s shall be written on it. Which is determined by: 1. One yr from the date of the meds, OR
2. The date of pps 'expiry' of any of the family members.
3. Whichever is earlier.
[all visa/s will cary that date of expiry as determined by the above]