Conditions:
  AlwaysTrueCond:
    Fn::Not:
    - Fn::Equals:
      - Ref: AWS::Region
      - completely-made-up-region
Resources:
  Bucket1:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: SomeBucketName
  Bucket2:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: 
        Fn::GetAtt: [ Bucket1, Arn ]
      CorsConfiguration:
        CorsRules:
          - AllowedMethods:
            - GET
            - POST
            AllowedOrigins:
            - Fn::Join: ['', [{ Ref: Bucket1 }, '1']]
            - origin2
            MaxAge:
              2
  Subnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId:
        Fn::If:
        - AlwaysTrueCond
        - Fn::Select:
          - 0
          - Fn::Split:
            - ","
            - Fn::ImportValue: ImportedVpcId
        - Fn::Select:
          - 0
          - Fn::GetAZs: eu-west-2
      CidrBlock: 10.0.0.0/24
      AvailabilityZone:
        Fn::Select:
        - '0'
        - Fn::GetAZs: ''