Section 35-6-02-06-404.01 - Category I errors include:1. Failure to assess or delete major improvements, such as, but not limited to, residences or other buildings larger than 600 square feet in size and which have an improvement true value greater than $50,000.2. Incorrect construction units totaling 25 units or greater on one building. Additional special use units will not be considered an error if their use is pre-approved by the property tax office.3. Data entry errors which are greater than $50,000 in true value.4. Failure during the update year to perform sales ratio studies as provided in the appraisal manual, providing that twelve or more arm's length sales occurred during the previous two year period.5. Failure to maintain an adequate sales file as set forth in the appraisal manual6. Failure to implement a building index during the update cycle within a 10 percent (10%) variance of the state index as calculated by the property tax office, unless otherwise approved in writing by the property tax office.7. Failure to provide the real property 25 percent (25%) list to the property tax office by April 1 st of the base year.8. Failure during the update cycle to update all land values, using urban land pricing and small tract schedules.9. The above mentioned errors 4-8 are not parcel specific, thus, they will be assigned 4 error points each.35 Miss. Code. R. § 6-02-06-404.01