Thats what it is in my opinion.
Please see some links in order to help you figure out if this is the term u are looking for:

Federal Register Notice: Proposed Revisions to Circular A-125 ...
... of the President's Publications Office, Room 2200 New Executive Office Building,
725 17th Street NW ... Starting the Payment Period" (Section 3.f.) has been ...
www.whitehouse.gov/OMB/fedreg/a-125d1.html

Policy Handbook: Standard Installment Payment Period
Standard Installment Payment Period. Policy: The standard installment payment period
for medium/long-term transactions is the semi-annual repayment term. [ This ...
www.exim.gov/manuals/policyhb/phinstal.html

Terms and Conditions of Sale or Service - CP 14-20
... 1) Payment Period. 2) Interest on Late Payment. 3) Discounts.
4) Notification of Queries and Complaints. ...
www.credit-to-cash.com/cp_14-20.htm

absence of debts in the period...

Period within which the payment should be completed.

Try Google.

Good luck.

Davorka

From my understanding, this refers to the period after the debt has come due during which it can legally be collected.