AWS SDK for .NET Documentation
StackPolicyURL Property
AmazonAmazon.CloudFormation.ModelSetStackPolicyRequestStackPolicyURL Did this page help you?   Yes   No    Tell us about it...
Location of a file containing the stack policy. The URL must point to a policy (max size: 16KB) located in an S3 bucket in the same region as the stack. You must pass StackPolicyBody or StackPolicyURL. If both are passed, only StackPolicyBody is used.

Constraints:

Length
1 - 1350

Declaration Syntax
C#
public string StackPolicyURL { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)