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

ACT 2005-06-17 no. 102: Act on certainaspects relating to the political parties (The Political Parties Act),(published 2005-05-17, last amended 2013-03-10)

Chapter 5. Committee for thecontrol of party funding, appeals processing, etc.

?24. Committee for the control of partyfunding and appeals processing

(1) The Political Parties Act Committee isan independent administrative body, administratively subordinate to the Kingand the Ministry. Neither the King nor the Ministry may issue instructionsconcerning the execution of authority by the Political Parties Act Committee inindividual cases under the law, nor may they alter it.

(2) The Political Parties Act Committee isgranted the authority to:

a) interpret the rules in this Act and inregulations issued on the basis of this Act

b) control compliance with the fundingprovisions of this Act

c) make decisions about the use ofadministrative sanctions and confiscations

d) make decisions on appeals regardingregistration, cf. section 8

e) make decisions on appeals of decisionson the awarding of public grants, cf. section 15

(3) The Political Parties Act Committeecan demand that the party or party unit presents all documentation that issignificant for compliance with the obligations in chapter 4 of this Act andthat the Committee finds reason to examine specially.

[…]

Chapter 6. Administrative sanctions,confiscations and penalties

?28 Administrative sanctions

(1) In the event of violations of therules in chapter 4, the Political Parties Act Committee determines by how muchthe party's public grant is to be reduced. A first violation of limited scopecan be sanctioned by a formal warning. In determining the amount by which thegrant is to be reduced, emphasis should be placed on how large a grant theparty or party unit may apply for in the relevant year, and the severity andduration of the violation, among other things. The Ministry can issue furtherrules about the reduction in regulations.

(2) The courts can review all aspects ofthe Political Parties Act Committee's decision pursuant to this Section.

?29. Confiscation

(1) For violations of the provisions insection 17a, first to fourth subsection, the Political Parties Act Committeeshall make a decision on the confiscation of up to the full value of thedonation that has been received illegally.

(2) Section 28(2) applies in acorresponding manner.

?30. Penalty

(1) Whoever intentionally or by grossnegligence gives materially incorrect information in connection with thereporting obligation in chapter 4 will be penalised by fines or imprisonmentfor up to two years.

(2) Whoever intentionally or by gross negligence is guilty of significantor repeat violations of the provisions in Section 17a will be penalised byfines or imprisonment for up to two years.

http://www.regjeringen.no/upload/FAD/Vedlegg/Partifinansiering/Political_parties_act.pdf