27 CFR § 6.66 - Calculation of period.

---
identifier: "/us/cfr/t27/s6.66"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "27 CFR § 6.66 - Calculation of period."
title_number: 27
title_name: "Alcohol, Tobacco Products and Firearms"
section_number: "6.66"
section_name: "Calculation of period."
chapter_name: "ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY"
subchapter_number: "A"
subchapter_name: "ALCOHOL"
part_number: "6"
part_name: "“TIED-HOUSE”"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 49-50; 27 U.S.C. 202 and 205; 44 U.S.C. 3504(h)."
regulatory_source: "T.D. ATF-74, 45 FR 63251, Sept. 23, 1980, unless otherwise noted."
cfr_part: "6"
---


# 6.66 Calculation of period.

For the purpose of this part, the period of credit is calculated as the time elapsing between the date of delivery of the product and the date of full legal discharge of the retailer, through the payment of cash or its equivalent, from all indebtedness arising from the transaction.