The phrase "unwarranted delays" means unnecessary or unjustified waiting times. It refers to situations where there is no valid reason for a delay to occur. Full definition
Hepburn v Royal Alexandra Hospital NHS Trust 2011 S.C. 20: whether competent et separatim appropriate to dismiss medical negligence claim on the basis of unwarranted delay in prosecution. (axiomadvocates.com)
We will always have more things to do than we can possibly do, so we will always be imposing some sort of unwarranted delay on some tasks. (rismedia.com)
We do not support government intervention that increases the cost of consumer borrowing, places restrictions on services provided by industry and cause unwarranted delay of transactions. (orlandorealtors.org)