This is not a good contract for the home owner. I'd want them to request permission in advance before accessing the property. I'd also want the contract to sunset after some time period. Using this contract, NS could effectively confiscate evidence of their own malfeasance. For instance, they could take a dead pet off the property for analysis and then incinerate it as would be normal for a dead animal. In return they give you a report stating the pet died of natural causes, but you can't get a second opinion because the pet is now a pile of ash.