What institution(s) has the power to impose non-criminal sanctions for campaign finance infractions?

Samoa

Answer

No specific regulation was found on campaign finance oversight

Source

ADB/OECD Anti-Corruption Initiative for Asia andthe Pacific, Combating corruption in Asia-Pacific: Samoa’s measures toimplement the Anti-Corruption Action Plan for Asia-Pacific

'Pursuant to the Electoral Act 1963, the Office of the ElectoralCommissioner has relevant information that the public can access. However,there is no legislative or administrative requirement to file, disclose oraccess information with regard to the funding of political parties, electoralcampaigns and expenditure other than those disclosed for the taxationpurposes'