tickable

That can be ticked; capable of being marked with a tick or check mark.

(birdwatching) Of a bird, located so that it may be travelled to and viewed.

(birdwatching) Of an observation, good enough to ensure correct identification and therefore allow the bird to be added to a list of observed birds.

(programming, PHP) Of a program instruction: counted for the purpose of generating periodic signals every few instructions.