Task: songer_usc1sect

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the number of the section from the title of the most frequently cited title of the U.S. Code in the headnotes to this case, that is, title 29. In case of ties, code the first to be cited. The section number has up to four digits and follows "USC" or "USCA".

PER CURIAM.
Review and enforcement of an order of the National Labor Relations Board is sought by these cross-petitions. The Board had found that the employer had violated § 8(a) (3) of the Act by the discharge of six employees and that, by other conduct, it violated § 8(a) (1) of the Act. After full consideration of the record, the briefs, and the argument of counsel, it appears that the Board’s findings of fact are supported by substantial evidence on the record considered as a whole. Accordingly, the Board’s order will be enforced.
Enforced.

Question: What is the number of the section from the title of the most frequently cited title of the U.S. Code in the headnotes to this case, that is, title 29? Answer with a number.
Answer:

Answer: 158