The Election Commission has advised the Madhya Pradesh Chief Minister Shivraj Singh Chouhan to be more careful while making speeches.
EC's direction came after the congress party registered a complaint with the election watch dog that a government project was announced by Chouhan at a time moral code of conduct is in force.
Chouhan allegedly made the announcement while addressing a public rally in bypoll-bound Mungaoli on February 16.
The poll body said that the Chief Minister violated model code of conduct by "announcing" the construction of bridge over a river.
A by-election for the Mungaoli assembly constituency is being held on Saturday. The counting of votes would take place on February 28.
The model code of conduct is enforced as soon as elections are announced. Under the rules, the government is barred from making any announcements that can impact the poll outcome in election-bound states and disturb the level playing field.