The SOC 3 is the least detailed, so the provider is not concerned about revealing it. The SOC 1 Types 1 and 2 are about financial reporting, and not relevant. The SOC 2 Type 2 is much more detailed and will most likely be kept closely held by the provider.

Explanation
Under the Federal Rules of Civil Procedure, data custodians are assumed and expected to have full and comprehensive knowledge of the internal design and architecture of their systems. In a cloud environment, especially with PaaS and SaaS, it is impossible for the data custodian to have this knowledge because those systems are controlled by the cloud provider and protected as proprietary knowledge.

The contract should include requirements for notification by the cloud provider to the cloud customer upon the receipt of such an order. This serves a few important purposes. First, it keeps communication and trust open between the cloud provider and cloud customers. Second, and more importantly, it allows the cloud customer to potentially challenge the order if they feel they have the grounds or desire to do so.