Who is responsible for checking the legality of initiatives?

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

Article153. Registration of Citizen Initiative Group

(1)The citizen initiative group for holding the  referendum shall beregistered with the Central Election Commission. For registration, the group shallsubmit the following documents:

a)documents of the citizen meeting which elected the initiative group, attestedby the mayor of the locality where the meeting took place;

b)written statement of consent of the members of the initiative group to collectsignatures in supportof the referendum;

c)written application statement for registration.

(2)The Central Election Commission within 15 days of receiving the documentsmentioned in paragraph (1) of this Article shall adopt a decision regardingeither the registration of the initiative group or the refusal to register thegroup. The decision on the registration of the initiative group shall providethe terms for signatures collection, which may be no shorter than two monthsand no longer than three months.

(3)Upon registration, members of the initiative group shall be issued a specialdocument-card attestingtheir right to collect signatures according  to the designestablished by the Central Election Commission.

(4)Information concerning registration of the initiative group and the questionssubject to referendum shall be made public through mass media.