MailStream Plus How can MSP create 30 byte IMpb for a 4th class mailing

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Question: The MSP software creates the 34-byte IM® package barcode will it create a 30-byte IM® package barcode?

There is no way for a user to tell MSP what the length of the IMpB barcode to create.
The length of the IMpB barcode is based on several factor
1.       Length of the Mailer IS you are using
2.       Whether  you choose to use the Short or Long serial number
3.       the Value of your ZIP code whether it is just the 5 digit 9 digit or 11 digit zip

UPDATED:  September 6, 2017