How does the application work at a high level, what rights does the family member receive, how long does the status last, and how can it become independent or longer-term where officially stated?
Applications are made online in the standard visa application form (via indianvisaonline.gov.in), and the applicant should be present within the jurisdiction of the Indian Mission/Post concerned when applying and when the visa is granted. The official source does not state the dependent's duration of stay, rights or any independent or longer-term route.
See recorded sources
Limits of the record- The source does not state the dependent's duration of stay, rights, or any independent or longer-term route.