Region province
Nord Gourcy
Nord Titao
Bassins Tuy
Bassins Houet
Bassins Kene
Sud Gaoua
Hello,
if we have regions of a country. each region has provinces. for example:
we send investigators to each region. So that there is no error, I want that if an investigator chooses his region in the telephone, he only sees the provinces of the region that he must investigated.
how to do this condition?