The Election Commission on Thursday charged Bahujan Samaj Party (BSP) general secretary Satish Mishra of violating the model code of conduct.
A show cause notice was issued to Mishra on late Thursday evening, asking him to explain his conduct during a public rally at Chandauli district on Feb 5, when he allegedly appealed to the audience in the name of caste.
"Mr. Mishra was found to have openly made appeals to his audience at the public rally to vote for the BSP since it was only political outfit combining the dalit and upper caste vote," a poll panel official told reporters in Lucknow.
"He has been asked to submit his explanation latest by Feb 12," he added.
Asked if anyone had made a complaint against Mishra, the official said: "We have video recordings of the public rally where Mr. Mishra went about repeatedly referring to BSP's Dalit-Brahmin social engineering."
According to the official, use of caste, creeds or religion in public meetings was not permissible under the model code of conduct.
Mishra had first shot into the spotlight as BSP's Brahmin mascot for playing a key role in building the "rainbow coalition" of the upper caste community with Dalits, the party's support base.