The value which is written to the MIB object pointed to by
schedVariable when the scheduler invokes an action. The
implementation shall enforce the use of access control
rules when performing the set operation on schedVariable.
This is accomplished by calling the isAccessAllowed abstract
service interface as defined in RFC 2571.
Note that an implementation may choose to issue an SNMP Set
message to the SNMP engine and leave the access control
decision to the normal message processing procedure.