H1 amendment

I am currently in US on H1B Visa. My Employer is planning for H1B amendment due to change in work location. My family(Wife,Child) is currently in India having H4 visa stamped.

After amendment done, if my family wants to come US, does they required to go for visa stamping again due to amendment ?

Please provide your inputs

No need for new stamping as long as the previous visa stamp has not expired.