A spokesperson from Island Green Power said: “The wording on objecting to the project is not in our standard heads of terms and should not have been included.
“Heads of terms are voluntary agreements, and landowners are not obliged to sign them.
“However, any who choose to sign will also be able to object to the project and make representations to the Planning Inspectorate if that is what they wish to do.”
The solar park has been designated as a Nationally Significant Infrastructure Project (NSIP), which means the application will be decided by the Secretary of State, and not Wiltshire Council.
A decision is expected within the next few weeks.