501

1、 https:crsreports.congress.gov October 18, 2018Donor Disclosure: 501c Groups and Campaign SpendingIntroduction Independe。

2、 https:crsreports.congress.gov March 30, 2018Securities Exchanges: Regulation and Reform Proposals Section 501 of S. 215。

3、1 IRS News Release IR2003146.2 While these organizations may participate in political campaign activity under the Intern。

4、Congressional Research Service The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code 9850。

5、Congressional Research Service The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code 9850。