Where can proposals be signed?
Latvia
Law on National Referendums, Legislative Initiatives and European Citizens? Initiative (last amended in 2012)
http://web.cvk.lv/pub/public/28862.html
Article 7
(1) The Central Election Commission shall set a term of 30 days during which the signature sheets for voters to sign shall be available at the places designated by city or municipality councils. [...]
(2) Signatures collection stations must be set up in each city and municipality so that there is at least one station per 10,000 voters where they may sign the petition.
(3) deleted by the Law of 8 November 2012.
(4) Not later than three days prior to the beginning of signatures collection referred to in paragraph 1 of this Article, city and municipality election commissions shall determine the opening times when voters will be able to sign signatures sheets at the stations designated by the relevant city or municipality councils. The opening times shall not be shorter than four hours a day, including Saturdays, Sundays and public holidays.
(5) The relevant council shall ensure that notifications about addresses and opening times of signatures collection stations are placed at the building of the relevant council (or public information points) and at signatures collection stations, as well as published in the newspaper of local government, but if there is no such newspaper, - in any other local newspaper.
(6) Voters who are abroad during collection of signatures may sign the signatures sheets in the embassies and other diplomatic or consular missions of the Republic of Latvia. The place and time of signatures collection shall be determined by the head of the relevant mission.