id	definition
1	Receiving Dock Advice
2	Post Receipt Advice
3	Disposition Advice
4	Metered Gas Volume Advice
5	Facility Operator's Allocation Advice
6	Natural Gas Seller's Allocation Advice
7	Pipeline Allocation Advice
8	Acceptance Certificate
9	Authorized Representative in Receipt of an Acceptance Alert
A	Authorized Representative Not in Receipt of an Acceptance Alert
R	Intermediate Point Receipt Advice