It has always been said, "Follow the instructions" when applying for a position. Otherwise, who would employ someone who cannot follow a simple set of instructions when doing just this.
One instruction I now see on a regular basis is "if you do not receive a reply within 3 days (for example) then assume your application is unsuccessful.
What is the accepted approach to this very simple instruction? Do I follow it to the letter, demonstrate that I can follow instructions and assume my application is unsuccessful or is it permitted to enquire in some way, maybe if the position has been filled, in a manner such as e-mail rather than a phone call, at what could be an inconvenient time?