Well noted, we would like to postpone the meeting with DMF (Topic – Discussion about the Document Master list, Custom Clearance, Immigration and etc.) ,for the next meeting, we will advise you date/time in advance.
Furthermore, Khun Todsapon from DMF has recommended you to read the manual of Import of petroleum experts, specialists, and equipment, materials, and supplies under Sections 69 and 70 of the Petroleum Act B.E. 2514 (1971) as below link.
1. Application manual for importing petroleum experts and specialists under Section 69 and equipment, materials, and supplies under Section 70 of the Petroleum Act B.E. 2514 (1971)
2. Sample letter for the application for the privileges to enter Thailand under Section 69 of the Petroleum Act B.E. 2514 (1971)
http://www.dmf.go.th/file/announcement_thai.html