Restrictions in relation to the individuals who can sign the proposal
Poland
Law on the manner of executing legislative initiative by the citizens adopted on 24 June 1999, Article 10
http://www.sejm.gov.pl/prawo/inicjat.htm (in Polish - the Parliament?s website)
Law on Nationwide Referendum adopted on 14 March 2003, see Article 63
http://pkw.gov.pl/g2/i/00/8.pdf (in English - but not updated)
http://isap.sejm.gov.pl/DetailsServlet?id=WDU20030570507 (in Polish ? the Parliament?s website)