(a) You as an agency official may not enter into a covered transaction with an excluded person unless you obtain an exception under § 19.120.

(b) You may not enter into any transaction with a person who is disqualified from that transaction, unless you obtain a waiver or exception under the statute, Executive order, or regulation that is the basis for the person's disqualification.

As an agency official, you may not enter into a covered transaction with a participant if you know that a principal of the transaction is excluded, unless you obtain an exception under § 19.120.

After entering into a covered transaction with a participant, you as an agency official may not approve a participant's use of an excluded person as a principal under that transaction, unless you obtain an exception under § 19.120.

(a) You as an agency official may continue covered transactions with an excluded person, or under which an excluded person is a principal, if the transactions were in existence when the person was excluded. You are not required to continue the transactions, however, and you may consider termination. You should make a decision about whether to terminate and the type of termination action, if any, only after a thorough review to ensure that the action is proper.

(b) You may not renew or extend covered transactions (other than no-cost time extensions) with any excluded person, or under which an excluded person is a principal, unless you obtain an exception under § 19.120.

If a transaction at a lower tier is subject to your approval, you as an agency official may not approve—

(a) A covered transaction with a person who is currently excluded, unless you obtain an exception under § 19.120; or

(b) A transaction with a person who is disqualified from that transaction, unless you obtain a waiver or exception under the statute, Executive order, or regulation that is the basis for the person's disqualification.

As an agency official, you must check to see if a person is excluded or disqualified before you—

(a) Enter into a primary tier covered transaction;

(b) Approve a principal in a primary tier covered transaction;

(c) Approve a lower tier participant if agency approval of the lower tier participant is required; or

(d) Approve a principal in connection with a lower tier transaction if agency approval of the principal is required.

You check to see if a person is excluded or disqualified in two ways:

(a) You as an agency official must check the EPLS when you take any action listed in § 19.425.

(b) You must review information that a participant gives you, as required by § 19.335, about its status or the status of the principals of a transaction.

You as an agency official must require each participant in a primary tier covered transaction to—

(a) Comply with subpart C of this part as a condition of participation in the transaction; and

(b) Communicate the requirement to comply with Subpart C of this part to persons at the next lower tier with whom the primary tier participant enters into covered transactions.

To communicate the requirements, you must include a term or condition in the transaction requiring the participants' compliance with subpart C of this part and requiring them to include a similar term or condition in lower-tier covered transactions.

If a participant knowingly does business with an excluded or disqualified person, you as an agency official may refer the matter for suspension and debarment consideration. You may also disallow costs, annul or terminate the transaction, issue a stop work order, or take any other appropriate remedy.

If you as an agency official determine that a participant failed to disclose information, as required by § 19.335, at the time it entered into a covered transaction with you, you may—

(a) Terminate the transaction for material failure to comply with the terms and conditions of the transaction; or

(b) Pursue any other available remedies, including suspension and debarment.

If you as an agency official determine that a lower tier participant failed to disclose information, as required by § 19.355, at the time it entered into a covered transaction with a participant at the next higher tier, you may pursue any remedies available to you, including the initiation of a suspension or debarment action.