Initiative promoter Tim Eyman has turned in signatures for his latest effort, a measure that would set penalties for harassment of signature gatherers and signers, and would allot more time for signatures to be collected.

Eyman turned in about 345,000 signatures on Thursday to the secretary of state's office for Initiative 517.

The proposal gives initiative supporters a year - instead of the current six months - to collect signatures. The measure would also require that voters be allowed to vote on any initiative that qualifies for the ballot, even if a lawsuit has been filed against the measure.

An initiative to the Legislature requires at least 241,153 valid signatures of registered state voters to be certified, though the secretary of state's office suggests at least 320,000 as a buffer for any duplicate or invalid signatures.