Section 515.578(b)(1) of the CACR excludes from authorization under 31 CFR 515.578(a)(1)-(3) the direct or indirect exportation or reexportation of services with knowledge or reason to know that such services are intended for a prohibited official of the Government of Cuba, as defined in 31 CFR § 515.337, a prohibited member of the Cuban Communist Party, as defined in 31 CFR § 515.338, or to organizations administered or controlled by the Government of Cuba or the Cuban Communist Party, except as specified in 31 CFR § 515.578(a)(4).
For purposes of assessing whether exports or reexports are excluded from 31 CFR § 515.578 pursuant to 31 CFR § 515.578(b)(1), internet-based service providers subject to U.S. jurisdiction may reasonably rely on information provided to them by their customers in the ordinary course of business, unless they know or have reason to know a transaction is not authorized.