Locally-owned enterprises are given preference in public procurement.
2. In this Act, unless the context otherwise requires­[…]
"domestic bidder" means any bidder whose principal place of business is within Malawi;
"domestic supplier"means any supplier whose principal place of business is within Malawi; […]
"foreign bidder" means a bidder other than a domestic or regional bidder;
"foreign supplier" means a supplier other than a domestic or regional supplier; [...]
"local enterprise" means supplier, contractor or consulting firm registered and operating in Malawi and whose shareholding is held in majority by Malawian nationals; 
[...]
36.-(1) A procuring and disposing entity may, in the prescribed manner-
(a) grant a margin of preference for the benefit of a bid by a micro small and medium enterprise offering goods,· works, consultancy services or other services manufactured, grown or performed by a local enterprise; and
(b) reserve or set aside certain procurement requirements for micro, small and medium enterprises by restricting bidding to those enterprises as prescribed in the Act.
(2) Notwithstanding the provisions of subsection ( 1 ), the Director General, in consultation with the Ministers responsible for trade, economic or social policy may, by order published in the Gazette, prescribe any preference or reservation for micro, small and medium enterprises.
[...]
44.( I) The choice of evaluation methodology shall be determined by the type, value and complexity of the procurement or disposal requirement and shal1 be done in accordance with this Act and as may be prescribed in regulations. [...]
(6) In the evaluation of bids, a procuring and disposing entity may apply a margin of price preference in favour of domestic or regional bidders in accordance with the regulations, provided that such application has been disclosed in the bidding documents. [...]
(10) A procuring entity shall ensure prioritization of all bids submitted to give preference to 60 per cent indigenous black Malawians and 40 per cent others for national competitive bidding. [...]" (Public Procurement and commencement Disposal of Public Assets Act No 27 of 2016)

Public Procurement and commencement Disposal of Public Assets Act No 27 of 2016
[<a href="https://www.mra.mw/assets/upload/downloads/Public_Procurement_and_Disposal_of_Assets_Act_2017.pdf">Act</a>]