What types of constraints are to be provided for Access Constraints?
The types of constraints intended are those applied to ensure rights
of privacy or intellectual property, and any other special restrictions,
limitations, or warranties on obtaining the information resources,
or its component products. Recommendations on the types of uses to which
the data set may or may not be applied should be described in the "Purpose"
data element (1.2.2). Descriptions of data quality should be provided
using the elements in section 2.