You should know what the Secretary is waiving. Excludability under the following provision:

(B) Terrorist activities-

(i) 3 4 4a IN GENERAL.-Any alien who-

(I) has engaged in a terrorist activity,

(II) a consular officer, the Attorney General, or the Secretary of Homeland Security knows, or has reasonable ground to believe, is engaged in or is likely to engage after entry in any terrorist activity (as defined in clause (iv));

(III) has, under circumstances indicating an intention to cause death or serious bodily harm, incited terrorist activity;

(IV) is a representative (as defined in clause (v)) of--

(aa) a terrorist organization (as defined in clause (vi)); or

(bb) a political, social, or other group that endorses or espouses terrorist activity;

(V) is a member of a terrorist organization described in subclause (I) or (II) of clause (vi);

(VI) is a member of a terrorist organization described in clause (vi)(III), unless the alien can demonstrate by clear and convincing evidence that the alien did not know, and should not reasonably have known, that the organization was a terrorist organization;

(VII) endorses or espouses terrorist activity or persuades others to endorse or espouse terrorist activity or support a terrorist organization;

(VIII) has received military-type training (as defined in section 2339D(c)(1) of title 18, United States Code) from or on behalf of any organization that, at the time the training was received, was a terrorist organization (as defined in clause (vi)); or

(IX) is the spouse or child of an alien who is inadmissible under this subparagraph, if the activity causing the alien to be found inadmissible occurred within the last 5 years, is inadmissible.

An alien who is an officer, official, representative, or spokesman of the Palestine Liberation Organization is considered, for purposes of this chapter, to be engaged in a terrorist activity.