Updated: September 2026 · Legal status: August 2026
The marking of a mast—including its paint and lights—is governed by regulations on aviation obstacles, not by its height alone, regardless of its location. A previous version of this post cited a 2003 regulation that has since been repealed; the thresholds we listed there are no longer in effect.
When a mast is an aviation obstacle
By law, throughout the country, an obstacle to air traffic is any structure with a height of from 100 m above the level of the surrounding land or water — measured including the antennas (Aviation Law, Art. 87¹, para. 1, item 2). Such a structure must be reported and marked.
Below 100 m, the location relative to surfaces bounded by obstacles around airports. If a structure extends beyond these limits, approval from the President of the Civil Aviation Authority (Article 87, paragraph 3) is required; for military airports, coordination with the Military Aviation Authority is required. Municipalities have maps of airport buffer zones; the approval specifies the details regarding the painting and lighting required for the structure.
Signage Thresholds
According to the current regulation of the Minister of Infrastructure dated January 12, 2021 (i.e., Journal of Laws 2025, item 903): obstacles up to 10 m are not subject to marking (§ 44), obstruction lights average Intensity is applied from 45 m (§ 36(1)), and high intensity from 150 m (§ 22(2)).
Aviation obstacles are one aspect of the paperwork involved with the mast—we’ll describe the others in the post about the building permit for the mast.
The competent authority determines whether a specific investment qualifies. This text describes the legal situation (as of August 2026) and our experience—it is not legal advice.