(1) Prior to procuring any goods, construction work or service, the chief of the public entity shall prepare, or cause to be prepared, the specifications, plans, maps, designs, special requirements or other details, referred to in Section 4 of the Act.
(2) The description prepared pursuant to sub-rule (1) has to be approved by the authority referred to in Rule 14. the specifications, plan, map, design, special requirements or other details
(3) Notwithstanding anything contained in sub-rule (2), the specifications, plans, maps, designs, special requirements or other details of structures of complex and special nature such as tunnels, railways, ropeways, cable-car ways and roads of special natures have to be approved by the head of department.
(4) The description prepared pursuant to sub-rule (1) may be amended in any of the following circumstances:
(a) If the construction work is of complex nature from geologically so that it cannot be foreseen at the time of preparation of the description,
(b) If there arises a situation of natural calamity after the preparation of the description,
(c) If the departmental norms are changed,
(d) If the pre-determined technology or system for conducting the construction work is changed,
(e) If there arises difficulty with its implementation because of the structure of being special and complex nature.
(5) Except where it is required to amend the description prepared pursuant to sub-rule (1) in any circumstance set forth in sub- rule (4), the chief of public entity shall have the duty to send an intimation for legal action pursuant to sub-section (2) of Section 5A. of the Act, and the one level higher authority shall have such a duty in cases where the chief himself or herself has approved the description referred to in sub-rule (1).