To enable everyone to enjoy the nature reserve and to ensure that its objective is realised, a number of rules apply. Within the reserve, the following prohibitions apply:
- Between 20 March and 15 July (every year), no one is allowed inside the area marked on the map. The exceptions here are specially marked roads, visitors' areas and walking tracks. These exceptions also apply in connection with visits to hide-outs erected by the nature conservation administrator in accordance with an approved preservation plan
- Between 20 March and 20 April (every year), no one is allowed inside the area marked on the map. This ban also applies to specially marked roads, visitors' areas and walking tracks
- No dogs are allowed in the area without leads.... No riding is allowed on marked walking tracks outside the road area.... No fires are allowed
- No one should disturb the animals by climbing in nesting trees or photographing bird's nests at close quarters or killing or stealing wild mammals, birds, reptiles or batrachians.... Driving motor vehicles on the ice is prohibited
- Motor vehicles, tents, caravans or campers cannot be parked/erected anywhere apart from specially-designated places
- Noticeboards, posters, placards or any other such items may not be put up
- Branches may not be broken off and living or dead trees and bushes may not be damaged in any other way. Plants such as shrubs, lichen, moss and herbs may not be dug up.
Lake Hornborga once again has a large fish population, just as it had before the five occasions on which the water was lowered. Since the restoration, the number of fish has increased sharply.
The owners of some properties around the lake and partners owning joint common land are entitled to fish in the lake. Fishing licences are sold by two of these common land partnerships. During the time access is prohibited (20/3-15/7), fishing should not take place out of consideration for the birds.
Bird shooting is permitted on private and jointly-owned land (in total, around 30 per cent of the lake). The remainder, which is owned by the Swedish Environment Protection Agency, is a protected area.Hunting now takes place on a far smaller scale than before.