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I studied it this morning. The law is very long, so I’ve selected some text.

Sanctuary Cities

CHAPTER 12—IMMIGRATION AND NATIONALITY
SUBCHAPTER I—GENERAL PROVISIONS

***Section 1373
Communication between government agencies and the Immigration and Naturalization Service

Notwithstanding any other provision of Federal, State, or local law, a Federal, State, or local government entity or official may not prohibit, or in any way restrict, any government entity or official from sending to, or receiving from, the Immigration and Naturalization Service information regarding the citizenship or immigration status, lawful or unlawful, of any individual.

***Section 1357
Powers of immigration officers and employees

(a) Powers without warrant

Any officer or employee of the Service authorized under regulations prescribed by the Attorney General shall have power without warrant—

(1) to interrogate any alien or person believed to be an alien as to his right to be or to remain in the United States;

***Section 1330, (this is in reference to Sessions withholding money from California)
Collection of penalties and expenses

(3)(A) The Secretary of the Treasury shall refund out of the Immigration Enforcement Account to any appropriation the amount paid out of such appropriation for expenses incurred by the Attorney General for activities that enhance enforcement of provisions of this subchapter.

(Oakland Mayor Libby Schaaf, California Governor Jerry Brown could be looking at life in prison)
***Section 1324. Bringing in and harboring certain aliens

(a) Criminal penalties

(1)(A) Any person who—
(iii) knowing or in reckless disregard of the fact that an alien has come to, entered, or remains in the United States in violation of law, conceals, harbors, or shields from detection, or attempts to conceal, harbor, or shield from detection, such alien in any place, including any building or any means of transportation;

(iv) in the case of a violation of subparagraph (A)(i), (ii), (iii), (iv), or (v) resulting in the death of any person, be punished by death or imprisoned for any term of years or for life, fined under title 18, or both.

***Section 1401. Nationals and citizens of United States at birth

The following shall be nationals and citizens of the United States at birth:

(a) a person born in the United States, and subject to the jurisdiction thereof;

(This section deals with kids born outside the U.S., except for this paragraph:)

(f) a person of unknown parentage found in the United States while under the age of five years, until shown, prior to his attaining the age of twenty-one years, not to have been born in the United States;

***Section 1409. Children born out of wedlock

(a) The provisions of paragraphs (c), (d), (e), and (g) of section 1401 of this title, and of paragraph (2) of section 1408 of this title, shall apply as of the date of birth to a person born out of wedlock if—

(1) a blood relationship between the person and the father is established by clear and convincing evidence,

(2) the father had the nationality of the United States at the time of the person’s birth,

(3) the father (unless deceased) has agreed in writing to provide financial support for the person until the person reaches the age of 18 years, and

(4) while the person is under the age of 18 years—

(A) the person is legitimated under the law of the person’s residence or domicile,

(B) the father acknowledges paternity of the person in writing under oath, or

***Section 1423. Requirements as to understanding the English language, history, principles and form of government of the United States

(a) No person except as otherwise provided in this subchapter shall hereafter be naturalized as a citizen of the United States upon his own application who cannot demonstrate—

(1) an understanding of the English language, including an ability to read, write, and speak words in ordinary usage in the English language: Provided, That the requirements of this paragraph relating to ability to read and write shall be met if the applicant can read or write simple words and phrases to the end that a reasonable test of his literacy shall be made and that no extraordinary or unreasonable condition shall be imposed upon the applicant; and

(2) a knowledge and understanding of the fundamentals of the history, and of the principles and form of government, of the United States.

***Section 1431. Children born outside the United States and residing permanently in the United States; conditions under which citizenship automatically acquired

(a) A child born outside of the United States automatically becomes a citizen of the United States when All of the following conditions have been fulfilled:

(1) At least one parent of the child is a citizen of the United States, whether by birth or naturalization.

(2) The child is under the age of eighteen years.

(3) The child is residing in the United States in the legal and physical custody of the citizen parent pursuant to a lawful admission for permanent residence.
https://www.gpo.gov/fdsys/pkg/USCODE-2001-title8/html/USCODE-2001-title8-chap12.htm