Landlords in Arkansas may be able to enter without permission due to a lack of state statutes regulating such behavior. This includes in cases when repairs are going to be made or when the unit is set to be shown to prospective renters. Those looking to limit this permission-less system must establish a prior notice system within the terms of their lease, which the landlord in question must then follow.
The information for this answer was found on our Arkansas Landlord Tenant Rights answers.