Where are spectre requisitions?

Excuse me, but could you kindly clarify where exactly can I find the spectre requisitions? I've been searching high and low for them, but they seem to be quite elusive. Is there a specific department or individual who handles these documents? Perhaps there's a particular system or process that I'm unaware of. I'd greatly appreciate any guidance you could provide to help me locate these requisitions promptly. Thank you in advance for your assistance.