8. The assistant director of capital assets and material resources is authorized to sign the following documents up to the amount specified:(1) supply contracts and contracts for the rental of immovables for less than $25,000;
(2) construction contracts for a total of less than $50,000 and orders for changes to construction contracts up to an amount of orders for changes for $50,000, but for less than $10,000 per order for change;
(3) professional services contracts and services contracts of a technical nature for less than $35,000.