The legislation/law in relation to this matter is not yet available. Therefore, it is best to wait until it is in order to ascertain whether it permits your sibling to apply.
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How can I include my sister to my Grenadian citizenship application?
Recently I learned that Grenada has expanded the scope of acceptable dependents in a CBI application, and single siblings with no children of the principal applicant can be included. I am interested in applying and adding my sister to the application, but I wonder if other requirements apply to a sibling dependent. Is there an age limit? Does the sibling need to be financially dependent on the principal applicant?