Where can proposals be signed?

ElectoralCode of Moldova (Revised 2012)
http://www.venice.coe.int/webforms/documents/?pdf=CDL-REF(2012)039-e

Article42. Collection of Signatures in Support of a Candidate

(1) Signatures are collected only insupport of an independent candidate or for initiating a referendum. In localelection signatures are collected only in the districts where independent candidatesare running for elections.

Article154. Collecting Signatures

(1) From the registration day, members of the initiative group areentitled to freely collect signatures for holding the referendum (hereinafterreferred to as signature collecting sheet).

(2)Signatures shall be collected according to Article 42 hereof, to becorrespondingly applied.