I'm assuming if they don't disclose they would face some serious repercussions, but the title of this post is misleading. It's not a ban on ALL foreign or foreign owned companies according to this source. It's only if they fail to comply with audits for 3 years in a row.

"The Holding Foreign Companies Accountable Act" bars securities of foreign companies from being listed on any U.S. exchange if they have failed to comply with the U.S. Public Accounting Oversight Board's audits for three years in a row.