; repeal of special contribution limits for contributions to national parties for certain purposes. Sec. 735. Restrictions on testing the waters. Sec. 736. Personal use ban for leadership PACS. Sec. 737. Prohibition on joint fundraising committees. SUBPART B—Prohibition on the appointment of big donor ambassadors and chiefs of mission Sec. 738. Prohibition on the appointment of big donor ambassadors and chiefs of mission. Subtitle B—Strengthening Oversight of Online Political Advertising Sec. 741. Expansion of definition of public communication. Sec. 742. Expansion of definition of electioneering communication. Sec. 743. Application of disclaimer statements to online communications. Sec. 744. Political record requirements for online platforms. Sec. 745. Preventing contributions, expenditures, independent expenditures, and disbursements for electioneering communications by foreign nationals in the form of online advertising. Subtitle C—Public Financing Part I—Small Dollar Financing of Senate Election Campaigns Sec. 751. Eligibility requirements and benefits of fair elections financing of senate election campaigns. Sec. 752. Exception to limitation on coordinated expenditures by political party committees with participating candidates. Sec. 753. Assessments against fines and penalties. Part II—Presidential Elections SUBPART A—Primary Elections Sec. 761. Increase in and modifications to matching payments. Sec. 762. Eligibility requirements for matching payments. Sec. 763. Repeal of expenditure limitations. Sec. 764. Period of availability of matching payments. Sec. 765. Examination and audits of matchable contributions. Sec. 766. Modification to limitation on contributions for Presidential primary candidates. Sec. 767. Use of Freedom From Influence Fund as source of payments. SUBPART B—General Elections Sec. 771. Modification of eligibility requirements for public financing. Sec. 772. Repeal of expenditure limitations and use of qualified campaign contributions. Sec. 773. Matching payments and other modifications to