Maximum flight altitude: Your copter can fly up to a maximum of 120 meters (400 feet) in Lithuania.
Maximum horizontal distance and FPV: In Lithuania, the drone is allowed to remove a maximum of 1.000 meters from you but still has to be operated within the range of visibility. This will enable you to leverage this limit legally only with very large multicopters.
Compulsory insurance: In Lithuania, you need drone insurance for third-party damages.
Maximum take-off weight (MTOW): The listed rules apply to drones weighing 300 grams to 25 kilograms.
Distance to airports: To the international airports Vilnius, Kaunas, Siauliai, and Palanga is a distance of one nautical mile (1.8 kilometers). Within the control zones (CTR), you must not climb higher than 60 meters above the ground. The clearance rules around airfields also apply to toy drones weighing less than 300 grams.
Other safe distances: A distance of 50 meters must be observed to strangers, vehicles, and buildings.
Regulations for commercial pilots: As far as I know, there is no distinction between leisure and commercial copters in Lithuania. Therefore, no further authorization is required if you want to fly commercially in Lithuania with your multicopter.
Helpful links: CAA
We have researched the listed drone regulations for Lithuania to the best of our knowledge. We can not guarantee the correctness of the information. If you want to be on the safe side, please contact the competent aviation authority. Alternatively, you can also ask the embassy in your country for further information about the regulations. Please leave us a comment when you receive news and/or gain experience with your copter in Lithuania!