With the aim to reduce administrative burden for supervised many inspections are 'deduplicated': similar groups of citizens are treated similarly and similar activities are carried out in the same way within one organization. Deduplication should increase flexibility within the inspection as inspectors are able to fulfill their job in any domain. Deduplication is based on the fulfillment of two conditions. The first is that the enforcement tools, or the powers that perform these inspections, are not too different. The second relates to the use of these instruments that has to be somewhat uniform as well. These conditions are assessed in a case study of the Transport and Water Management Inspectorate. It is concluded that in particular the style of rule enforcement differs and is not easy to standardize.