In accordance with the requirements of the "Consultants' Competitive Negotiation Act," F.S. § 287.055, all procurement of professional services as defined in section 2-424, will comply with the provisions of this division when professional services are required for a project and the basic construction cost is estimated to exceed the threshold amount provided in F.S. § 287.055 (3)(a)1. or for a planning or study activity and the fee for professional services is estimated to exceed the threshold amount provided in F.S. § 287.055 (3)(a)1., except in cases of valid public emergencies so certified by the city manager.