The 15-minute accreditation briefing that prevents 90% of your access control issues.
Most festivals spend 2 hours explaining everything. Nobody retains it. Everything still turn into arguments.
Here's what actually works:

THE SETUP (2 minutes)
Gather everyone who'll be checking accreditations:

Gate security
Backstage access stewards
Artist area guards
VIP entrance staff

Do this the morning of Day 1, or night before if possible.

THE BRIEF (10 minutes)

1. The One Rule (1 min)
   "No wristband, no entry. No exceptions. Not for artists, not for mayors, not for your cousin."
   Make them repeat it back.
2. The Zone codes/Colours (2 min)
   Hold up actual badges/wristbands:

Zone code = which access
Red = Organisation
Blue = Artists
Green = Crew

Show them. Let them touch them. Visual memory works.

1. The 3 Common Tricks (3 min)
   People will try:

"I left my wristband in the car" (answer: go get it, we'll wait)
"I'm with [artist name]" (answer: then they'll have your name on the guest list)
"I was here yesterday" (answer: great, show me today's wristband)

Practice saying no. Literally make them practice.

1. The Escalation Path (2 min)
   If someone insists:

Radio/call the zone manager (give them the number)
Zone manager calls accreditation office
Decision comes back in under 2 minutes
Do NOT let people wait at the gate , send them to info point

Write this number on their hand if needed.

1. The Safety Out (2 min)
   If you feel unsafe, step back and radio security.
   Your job is to check wristbands, not wrestle people.
   Emergency override: production manager can greenlight anyone. Only them.

THE FOLLOW-UP (3 minutes)
Q&A rules:
Only questions about what to DO, not hypotheticals
If it's not in the brief, the answer is "radio the zone manager"

Hand out:

Zone map with zones/colors marked
Emergency numbers laminated card
2 spare badges to study during quiet moments

THE SECRET:
Most access problems aren't about badges, they're about confidence.

Your gate staff need to:

• Know the one rule cold
• Recognize the badges wristbands
• Have a clear escalation path

Everything else is noise.
Time investment:

• 15 minutes briefing
• 2 minutes zone map prep
• 5 minutes printing reference cards

RESULT
90% fewer "can you call someone" situations
No arguments that escalate
Your production team isn't fielding 50 calls/hour

With this guide the average radio calls about access dropped from 43/hour to 4/hour.