Does the law criminalize any election-related offenses?

Organic Law governing presidential andlegislative elections

 N?27/2010 of 19/06/2010

Article 187: Penalties to offences related to disturbance ofelectoral process

Without prejudice to heavier penalties than those provided by thepenal code, offences committed aimed at disturbing the electoral process arepunished by penalties provided in this Title.

http://aceproject.org/ero-en/regions/africa/RW/rwanda-organic-law-nb0-17-2003-of-07-07-2003/view