Are you prohibited in this situation to drive past the traffic light post with this light displayed?

In the photo you are approaching a junction in the left-turn lane, and there are signs A-7 and D-6 at the junction; the traffic lights above the junction and the traffic lights at the crossing are showing a red signal. A red light prohibits you from driving past the traffic lights. The answer is: yes.

The Regulation on road signs and signals states that a red signal shown by traffic lights S-1 means that you must not drive past the traffic lights. Sign A-7 applies only when the traffic lights are not working - the Road Traffic Act gives light signals priority over signs that set the right of way. You stop before the stop line or before the crossing and wait for green.

Legal basis: § 95 para. 1 point 3 of the Regulation on road signs and signals; Art. 5 para. 3 of the Road Traffic Act (Prawo o ruchu drogowym)