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# Stateless Parameter Validation
The stateless parameter validation object checks the input parameters to API calls for validity.
This layer performs the following tasks:
- validation of structures; structures are recursed if necessary
- validation of enumerated type values
- null pointer conditions
- stateless valid usage checks
- checks requiring only static state such as properties or limits
The Stateless Validation is run before [Core Validation Checks](core_checks.md). If there is a
validation error found in Stateless Validation, it will return and not call Core Validation nor call down the layer chain.