1. If the employer provides the materials for the work, the contractor shall preserve them with the care of an ordinary person, observe the technical standards in performing the work, and return to the employer what remains thereof. The contractor shall be liable for such materials, or what remains thereof, if they are destroyed, damaged, or lost while in their possession due to a reason attributable to the contractor. 2. If some or all of the materials provided by the employer become unusable due to the contractor's negligence, the contractor shall refund their value to the employer with compensation where justified. 3. If defects arise or appear during the execution of the work in the materials provided by the employer, or if other factors arose that would hinder the execution of the work in appropriate conditions, the contractor shall immediately notify the employer thereof. If the contractor fails to give such notice, they shall be liable for all consequences resulting from such failure.
Interpretation and application must be checked against the official text and current version.