* Greece-IMF/EU talks will last two weeks - fim min
* A joint text on aid mechanism will be agreed by May 15
* Greece can "theoretically" ask for aid before
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ATHENS, April 21 (Reuters) - Greece's talks with European and IMF officials on a potential aid package will last two weeks and a joint text will then be agreed by May 15, the country's finance minister said on Wednesday.
"The mechanism will be activated and operate, if Greece asks for it, based on the joint text ... this is the process we have chosen," George Papaconstantinou said after the talks started on Wednesday.
Asked if Greece could seek aid before that, he said: "Theoretically, Greece could do it even tomorrow."
Ministry officials said he was speaking "strictly theoretically" and did not mean Greece would seek to tap aid before a deal was clinched.
The talks aim to hammer out details of an economic plan that could offer Greece up to 45 billion euros ($60.49 billion) of aid to exit a debt crisis rocking the euro zone.
"The talks will last two weeks ... After the talks there will be a joint text. Everyone is in a hurry to have a framework. The deadline is May 15," Papaconstantinou said.
He dismissed rumours about Greece being forced to restructure its debt, saying they were "nonsense". (Reporting by Lefteris Papadimas; Writing by Ingrid Melander)