Under the Anti-Drunk and Drugged Driving Act (RA 10586), what is the legal consequence if a driver involved in a vehicular accident refuses to undergo mandatory chemical testing?

1. The driver's license is confiscated and automatically revoked
2. The driver is issued a minor fine of PHP 1,000
3. The driver is allowed to leave the scene after signing a waiver
4. The other driver is automatically blamed for the accident