C1
If the Activity Flag (field :17B::ACTI) in sequence A General Information indicates no pending transactions, ie, N, then sequence B Financial Instrument must not be present (Error code(s): E66).
C2
The Safekeeping Account (field :97a::SAFE) must be identified in sequence A General Information, or in all occurrences of subsequence B2c Trading Parties, but not in both (Error code(s): E67).
C3
If the message is a cancellation, ie, Function of the Message (field 23G) is CANC, then subsequence A1 (Linkages)
must be present at least once Linkages
in the and a reference to the previous message must be specified
message, and in one and only in one occurrence of A1,
field :20C::PREV must be present; Linkage section, ie,
consequently,
in minimum once
all other occurrences of A1, field :20C::PREV is not allowed
(Error code(s): E08).
that message
In each occurrence of subsequence B2, either an ordered quantity (field :36B::ORDR) or an ordered amount (field :19A::ORDR) must be present, but not both; in addition, if field 36B is present then field 19A must not be present, and vice versa if field 19A is present then field 36B must not be present (Error code(s): E58).