R.I. Gen. Laws § 17-15-17: Notice of primaries.

At least eight (8) days before the time of holding any primary election, the local board shall cause notice of the primary to be posted in at least one public place in each voting district of any city, and in at least one public place in each voting district of a town. The notice shall state the time when, and the place where, the primary is to be held in each city, town or voting district, and the offices for which candidates are to be nominated; provided, that the local boards may, at their discretion, substitute notification by publication in a newspaper having local circulation for notification by posting in public places.