2.18 In the case of being a family member of a Thai national (applicable only to parents, spouse, children, adopted children, or spouse’s children): Each permission shall be granted for no more than one year.
1) The alien must have been granted a non-immigrant visa (NON-IM). (2) The alien must have proof of relationship.
5) In the case of parents, the father or mother must maintain an average annual income of no less than Baht 40,000 per month throughout the year or must have deposited funds of no less than Baht 400,000 to cover expenses for one year