Right to reject - Rule 49 (O) of the Conduct of Elections Rules

Do u know that there is a provision by which a voter at the polling booth can declare that he/she don't want to vote for any of the candidates but this needs to be done publicly.
WELL THATS THE RULE 49(0)

http://www.indiatogether.org/2009/mar/gov-negvote.htm

[update:- 9/04/2011] http://lawmin.nic.in/ld/subord/cer1.htm
the form 17A can be downloaded from
http://wbsec.gov.in/Forms/Panchayat/form%2017a.pdf