[Sandy]

In section 1801, subsection (i), it is explicitly stated that a United States person "does not include a corporation or an association which is a foreign power".

That's not relevant at all. The only purpose of that phrase is to exclude some foreign power corporations/associations from the definition. For clarity, read it like this:

United States person means...

1. a citizen of the United States;

2. an alien lawfully admitted for permanent residence;

3. an unincorporated association a substantial number of members of which are citizens of the United States or aliens lawfully admitted for permanent residence, but does not include an association which is a foreign power as defined in subsection (a)(1), (2), or (3) of this section;
or
4. a corporation which is incorporated in the United States, but does not include a corporation which is a foreign power as defined in subsection (a)(1), (2), or (3) of this section.

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Have you read Section 1802

Section 1802 allows surveillance without a court order but *only if* the target is a foreign power as defined in 1801(a)(1), (2), or (3).

In all other instances, 1804 is the applicable section.

[joseph20]

That's not relevant at all. The only purpose of that phrase is to exclude some foreign power corporations/associations from the definition.

Sandy, read these sections please:

section 1801, subsection (a)(1)(B): Notwithstanding any other law, the President, through the Attorney General, may authorize electronic surveillance without a court order under this subchapter to acquire foreign intelligence information for periods of up to one year if the Attorney General certifies in writing under oath that [among other things] there is no substantial likelihood that the surveillance will acquire the contents of any communication to which a United States person is a party

section 1801, subsection (i): ''United States person'' [among other things] does not include a corporation or an association which is a foreign power

section 1801, subsection (a): ''Foreign power'' means [among other things] a group engaged in international terrorism or activities in preparation therefor

section 1801, subsection (b)(2)(C): ''Agent of a foreign power'' means [among other things] any person who knowingly engages in sabotage or international terrorism, or activities that are in preparation therefor, for or on behalf of a foreign power

If you are an American citizen and you collaborate with international terrorists, then you are an agent of a foreign power and you are in association with a foreign power.

If you an agent of a foreign power and you are in association with a foreign power, then you are not protected as a United States person under this law.