Until AWS will spread the life cycle manager to all regions this works ok. This is for 7 days retention but can easily be changed.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"ec2:DescribeInstances",
"ec2:DescribeTags",
"ec2:CreateTags",
"ec2:DescribeVolumes",
"ec2:CreateSnapshot",
"ec2:DescribeSnapshots"
],
"Resource": "*"
}
]
}