Object Permissions for Users

The following table displays the permissions required by users for Approval Objects:

Object	allowCreate	allowDelete	allowEdit	allowRead	modifyAllRecords	viewAllRecords
AdhocApprovalGroup__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
AdhocApprovalProcess__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
AdhocApprover__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
ApprovalJob__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
ApprovalProcessInstance__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
ApprovalRuleAssignee__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
ApprovalRuleDimension__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
ApprovalRuleEntry__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
ApprovalRule__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Approval_Matrix__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Approval_Process__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Approval_Request_History__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Approval_Request__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Apttus__APTS_Admin__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Apttus__APTS_Agreement__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Apttus__Term_Exception__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
AsyncActionInfo__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Backup_Approver__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
FormulaField__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Global_Discount_Policy__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Opportunity	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
ReminderInstance__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Reminder__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
SearchFilter__c	FALSE	FALSE	FALSE	TRUE	FALSE	FALSE
Term_Exception_Approval_Condition__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE
Term_Exception_Approval__c	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE

For information on setting object permissions, refer to this Salesforce article.