When is the recall put to the vote?

Iceland's Constitution (1944, last amended in 2013)

Article 11.

The President of the Republic may not be held accountable for executive acts. The same applies to those who exercise presidential authority.

The President may not be prosecuted on a criminal charge except with the consent of Althingi.

The President may be removed from office before his term expires if approved by a majority in a plebiscite called pursuant to a resolution adopted by three-fourths of the Members of Althingi. This plebiscite shall be held within two months from the date of adoption by Althingi of the resolution. The President shall not perform his duties from the time the resolution is adopted by Althingi until the results of the plebiscite are known.

If the resolution by Althingi is not approved in the plebiscite, Althingi shall be immediately dissolved and new elections called.

Act on the implementation of referendums (2010, amended in 2011)

4. gr. Þjóðaratkvæðagreiðsla skv. 1. mgr. 1. gr. skal fara fram í fyrsta lagi þremur mánuðum og í síðasta lagi einu ári eftir að þingsályktunartillaga hefur verið samþykkt á Alþingi.  

- Þjóðaratkvæðagreiðsla skal fara fram innan tveggja mánaða eftir að krafa Alþingis er samþykkt skv. 3. mgr. 11. gr. stjórnarskrárinnar eða forseti synjar lagafrumvarpi staðfestingar skv. 26. gr. stjórnarskrárinnar. [...]

Within two months after the resolution of the Althingi