id	description	section	req	max_loop	max_usage	pos
BVA	Beginning Vehicle Advice	H	M	99	1	1
V1	Vessel Identification	H	O	0	1	2
L7	Tariff Reference	H	O	0	5	3
VAD	Vehicle Advice Detail	H	M	99	1	4
L7	Tariff Reference	H	O	0	5	5