(a) One or more natural persons, partnerships, associations or corporations, domestic or foreign, may form a corporation under this division by executing and filing articles of incorporation.
(b) If initial directors are named in the articles, each director named in the articles shall sign and acknowledge the articles; if initial directors are not named in the articles, the articles shall be signed by one or more persons described in subdivision (a) who thereupon are the incorporators of the corporation.
(c) The corporate existence begins upon the filing of the articles and continues perpetually, unless otherwise expressly provided by law or in the articles.