Modifications to the basic contract instrument and to calls/orders against contracts are numbered with a four character alphanumeric number. The supplemental identification numbering system applies to all modifications to contracts and to call/orders against contracts.
Character(s)
|
Content
|
Description
|
Example
|
1
|
Office Issuing
Modification
|
A = Administrative Office
P = Purchasing Office
|
A
|
2
|
Action Type
|
A = Administrative Change
C = Change Order
O = Other
S = Supplemental Agreement (bilateral signatures)
|
S
|
3-4
|
Serial Number
|
01-99
Al-A9 to ZI-Z9
AA-AZ to ZA-ZZ
|
B2
|
