In Swedish law, there is a strong protection for fish conservation applicable to land parcelling as a result of which fishing is divided. The provisions regarding the split of fishing, as found in FBL 3:8, represents a strong public interest and is legally binding for the fishing right holder. In short, this means that a fish right bounded to property may not be divided by land parcelling in a manner that cause problem of any significance for fish conservation. Lantmäteriet in its role as authority shall examine whether the division of fishing causes problems for fish conservation. The purpose of this study was to investigate how the authority interprets and applies FBL 3:8 when dividing fishing. To investigate this, a survey and interview survey was handed out to the authority. The result shows that the number of fish dividing cases differ between surveyors which affects how common they handle FBL 3:8.The study also showed that about every third fish case had not an investigation to FBL 3:8. The application of FBL 3:8 differs by province, but also between every single surveyor. In some areas the surveyors are very restrictive and in some other areas they find dividing of fishing acceptable in certain special situations.