Clause 33.2.1 — 33 "Road Signs", 2 "Priority Signs", sign 2.1 "Yield"

"At sign 2.1 'Yield', the driver must yield to vehicles approaching an uncontrolled intersection on the main road, and if there is plate 7.8 'Direction of the main road' — to vehicles moving on the main road. The sign is installed directly before the intersection or a narrow section of the road. Outside populated areas on roads with a hard surface, the sign is repeated with an additional plate 7.1.1 'Distance to the object'."

Brief application: sign 2.1 belongs to priority signs and establishes the obligation to 'yield' specifically when approaching an uncontrolled intersection (or before a narrow section of the road — if so installed).

Clause 16.1

"An intersection where the order of passage is determined by traffic light signals or a traffic controller is considered controlled. At such an intersection, priority signs do not apply. If the traffic light is off or operating in flashing yellow mode and there is no traffic controller, the intersection is considered uncontrolled, and drivers must follow the rules for passing uncontrolled intersections and the relevant road signs installed at the intersection."

Brief application: this clause directly states that at a controlled intersection, priority signs (including 2.1) do not apply, but they do apply at an uncontrolled intersection (including when the traffic light is off/flashing yellow and there is no controller).

Clause 8.3

"The signals of a traffic controller take precedence over traffic light signals and the requirements of road signs and are mandatory. Traffic light signals, except for flashing yellow, take precedence over priority road signs. Drivers and pedestrians must also comply with additional requirements of the traffic controller, even if they contradict traffic light signals, road signs, and markings."

Brief application: establishes the hierarchy of regulation — when the traffic light is operating (except for flashing yellow), the priority sign does not determine the order of passage, but when the traffic light is flashing yellow/off (and there is no controller), priority signs become relevant.

Thus, the correct answer is "At an uncontrolled intersection," given that according to the Traffic Rules, at a controlled intersection priority signs do not apply (clauses 16.1, 8.3), and sign 2.1 "Yield" establishes the requirement to yield specifically when approaching an uncontrolled intersection (clause 33.2.1).

In front of you is sign 2.1 "Give Way." This is a priority sign, meaning it is used to establish the order of passage where drivers need to independently determine who has the right of way.

The requirement of this sign is as follows: when approaching an intersection, the driver must yield to vehicles moving on the main road. A complete stop is not required here, but speed should be reduced to a safe level and, if necessary, the driver should stop to let those with priority pass.

The key point in the question is—where exactly does this sign "apply." Priority signs are used when the intersection is uncontrolled, that is, when the order of passage is not set by a traffic light or a traffic controller. It is precisely at an uncontrolled intersection that the driver follows the priority signs and determines who goes first.

If the intersection is controlled (a traffic light is operating or there is a traffic controller), then the order of movement is determined by their signals, and priority signs at such an intersection do not apply. At the same time, sign 2.1 may remain installed even before a traffic light "just in case": if the traffic light is off or operating in flashing yellow mode and there is no traffic controller, the intersection is considered uncontrolled, and then drivers again follow sign 2.1.

Therefore, the correct answer is "At an uncontrolled intersection," since sign 2.1 is a priority sign and determines the obligation to yield only when the order of passage is not set by a traffic light or a traffic controller.