At the very bottom of the article is the link provided:
"25 Part V. Gifts Report information on gifts aggregating more than $415 in value received by the filer, spouse and dependent child from any source other than a relative during the reporting period. Any gift with a fair market value of $166 or less need not be aggregated to determine if the $415 reporting threshold has been met. 5 U.S.C. § 13104(a)(2)(A)."
"A gift is a payment, advance, forbearance, rendering, or deposit of money, or anything of value, unless consideration of equal or greater value is received by the donor. 5 U.S.C. § 13101(5)."
"Food, lodging, or entertainment received as personal hospitality need not be reported. Personal hospitality means hospitality extended for a nonbusiness purpose by an individual, not a corporation or organization, at the personal residence of that individual or his or her family or on property or facilities owned by that individual or his or her family. 5 U.S.C. § 13101(14)."
"The personal hospitality gift reporting exemption applies only to food, lodging, or entertainment and is intended to cover such gifts of a personal, non-business nature. Therefore, the reporting exemption does not include:"
More in the link,
LINK
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The article rambles on and on but doesn't SPECIFY a real legal violation against Thomas who undoubtedly went on all those voyages but most of the article talks about
ETHICS not lawbreaking.