---
AWSTemplateFormatVersion: "2010-09-09"
Parameters:
  IamPolicy:
    Type: String
  PrimaryRegion:
    Type: String
Conditions:
  isPrimaryRegion: !Equals [!Ref PrimaryRegion, 'us-east-1']
Resources:
  IamGroup:
    Type: AWS::IAM::Group
    Properties:
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/AdministratorPolicy
      - arn:aws:iam::aws:policy/AdministratorPolicy
      - !Ref IamPolicy
      - !Ref IamPolicy
  IamGroupWithConditions:
    Type: AWS::IAM::Group
    Properties:
      ManagedPolicyArns:
        Fn::If:
        - isPrimaryRegion
        - - arn:aws:iam::aws:policy/AdministratorPolicy
          - arn:aws:iam::aws:policy/AdministratorPolicy
          - !Ref IamPolicy
          - !Ref IamPolicy
        - !Ref AWS::NoValue
  IamGroupWithNestedConditions:
    Type: AWS::IAM::Group
    Properties:
      ManagedPolicyArns:
        - !If ['isPrimaryRegion', 'arn:aws:iam::aws:policy/AdministratorPolicy', !Ref 'AWS::NoValue']
        - !If ['isPrimaryRegion', 'arn:aws:iam::aws:policy/AdministratorPolicy', !Ref 'AWS::NoValue']