When does voting take place once an initiative is qualified for ballot?

Law on Nationwide Referendum adopted on 14 March 2003

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)

Article 65.

1. The resolution of the Sejm or an order of thePresident of the Republic on holding a referendum shall describe:

1) the legal basis of executing the referendum;

2) the content of questions or variants of solutionsof the issue being subject

of the referendum;

3) the date of the referendum;

4) the time limits for performance of activitiesprovided to execute the referendum.

[…]

4. A referendum is held no later than the 90th dayafter proclamation of a resolution or order, referred to in paragraph 1.