What is a required condition for accepting land and hold short instructions on a runway?

The condition that must be met for accepting land and hold short instructions on a runway is that the runway must be dry. This is crucial because a dry runway provides the necessary traction for aircraft during landing, allowing for proper deceleration and control. When a runway is wet, icy, or otherwise obstructed, it can significantly affect the aircraft's performance, particularly in terms of braking effectiveness.

Ensuring the runway is dry minimizes risks associated with landing, such as hydroplaning, which can occur on wet surfaces and lead to an inability to stop the aircraft in the intended area. This is particularly important when following land and hold short instructions, as these require precise management of aircraft positioning and speed to ensure safety and efficiency in controlled airspace.

While runway markings and the presence of tailwind components can impact landing operations, they do not represent the fundamental requirement that actively ensures safety during the landing process. A primary runway designation also does not directly relate to the acceptability of land and hold short instructions, as such procedures can be utilized on various runway types as long as proper conditions are met.