A federal judge has invalidated a New York state Ethics Law requiring § 501(c)(3) and § 501(c)(4) tax-exempt organizations to publicly report their donors under certain circumstances. Background. Organizations exempt from taxation under Internal Revenue Code (“IRC”) § 501(c)(3) (charitable organizations) are expressly prohibited from participating in any political campaign activity for or against a candidate for public office. Such organizations are permitted to engage in lobbying, but lobbying activity may not constitute a “substantial…