how to enable/disable a cron job via lambda in aws?

Question

set up - a cron job to invoke a lambda via cloudformation. I need to enable/disable this cron job via another lambda, or even delete this based on some other process/trigger. is that possible or how can i do that?

cronJob:
  Type: AWS::Events::Rule
  Properties:
    ScheduleExpression: cron(0/15 * * * ? *) 
    Targets:
      - Arn:
          Fn::GetAtt: [ someLambdaFunction, "Arn" ] 
        Id:
          Ref: someLambdaFunction

someLambdaFunction:
  Type: AWS::Lambda::Function
  ...