Powershell Script to Add AD Security Group to Shared Folder with Inheritance/Propogation set to "This Folder, Subfolders & Files"

I would like to modify the following Powershell script to add an AD Security Group to a shared folder, but I'd like to also like to set the Inheritance and Propagation flags so that the security group is applied to "This Folder, Subfolder & Files":

$acl = Get-Acl \\OFS1\Data\Accounts

$AccessRule = New-Object System.Security.AccessControl.FileSystemAccessRule("OREP\Custom-ADSecurityGroup","FullControl","Allow")

$acl.SetAccessRule($AccessRule)

$acl | Set-Acl \\OFS1\Data\Accounts

I have seen various references to setting the Propagation=none and Inheritance=Container|Object and that it might be represented as so:

InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit
PropagationFlags.None

I have no idea how to incorporate this into the script above...