The penalty for the late filing of an overhead line permit form can vary depending on various factors and the specific regulations and policies of the organization or agency involved. Generally, penalties can include fines or fees, and they may increase the longer the form remains unfiled. In some cases, repeated late filings may lead to additional penalties or consequences, such as suspension or revocation of permits. It is important to consult the relevant authorities or organizations for accurate information regarding the specific penalty for late filing of an overhead line permit form in a particular jurisdiction or context.