The board of trustees of The Medical University of South Carolina may grant rights-of-way, easements, or otherwise convey to the city council of Charleston such property as they deem necessary and required for the purpose of widening and extending streets through The Medical University land when it shall be to the advantage of The Medical University. The president of The Medical University may sign all documents necessary to complete the transactions herein provided for, after they have been approved in writing by the board of trustees in each such instance.