As indicated in the answer to question 2 above, evidence in motion proceedings is generally by affidavit unless the Court directs otherwise. In actions, evidence is given orally. The evidence of expert witnesses as well as copies of plans, diagrams, etc. have to be made available to the other party before trial. Witnesses who give oral evidence are subject to cross-examination.
In coming to a decision, a judge in the first place evaluates the evidence tendered in court, but he may take cognisance of other laws of the country, e.g. the provisions of the Constitution of South Africa.