According to Revenue Minister K Rajan, K-Rail was given three options to mark boundaries: plant survey stones where people give their consent; use Geo-tagging; or use markers on permanent structures.
The Kerala CM was addressing an election convention seeking votes for CPM candidate Dr Jo Joseph.
The LDF is facing the bypoll projecting itself as a pro-development force.
The ruling CPM has not reacted to the allegations.
The LDF has never won in Thrikkakara Assembly constituency since it was formed in 2011.
The Thrikkakara seat fell vacant after the death of Congress leader P T Thomas in December last year. The by-election for the seat is to be held on May 31 and the last date for filing of nominations is May 11.
Taking the League out of the UDF could also be a tactical mistake. Reason: the CPM has quite successfully used the presence of the League to poke at Congress's secular credentials.
The CPM Secretariat made it clear that the invite to the IUML was both untimely and improper and said it had caused confusion among the party cadre.
AAP had recently made headlines by wresting power in Punjab. Now, as it looks to built itself as a worthy contender in the national stage, a foothold in Kerala may seem a likely move.
It has been suspected that Jayarajan's LDF convener post could be an indication of the thawing of relations between the former and Kodiyeri.