(?(condition)yes-pattern|no-pattern) だそうなので、これやってみて。
> (?(?=[^A-Z]*[A-Z])\d{2}-[A-Z]{3}-\d{2}|\d{2}-\d{2}-\d{2})
　↓
  (?([^A-Z]*[A-Z])\d{2}-[A-Z]{3}-\d{2}|\d{2}-\d{2}-\d{2})