A family needs to run a sewer line through a neighbour's property to connect to the main line and obtained a No Objection Certificate (NOC). However, the neighbour has since withdrawn permission, causing delays. The advice suggests that since the NOC was a personal agreement, legal recourse might be difficult and lengthy. The recommended approach is to try and resolve the issue amicably, possibly with a financial settlement and a registered mutual agreement, to avoid prolonged legal battles and ensure the work can proceed.