The definitive order has been given by the SVP delegates in June. Now the actual text (change of the constitution) needs to be worked out, then signatures collected, potentially a counterporposal by the Bundesrat, debate in both parliament chambers, and the vote.

This can easily take five or six years, no less than four, and that's assuming the Initiative is launched reasonably soon. Considering the SVP wouldn't have taken that decision had not the AUNS already decided on launching one (by which they would have seized the SVP's core and pet topic), they may indeed take their time.