Section 304. Statutory designation of secretary of state as agent of domestic corporations formed under article four of this chapter and authorized foreign corporations for service of process

(a)  The  secretary  of  state  shall  be  the agent of every domestic
  corporation  formed  under  article  four  of  this  chapter  and  every
  authorized foreign corporation upon whom process against the corporation
  may be served.
    (b)  Any  designation  by  a domestic corporation formed under article
  four of this chapter or foreign corporation of the secretary of state as
  such agent, which designation is in effect on the effective date of this
  chapter, shall continue. Every domestic corporation formed under article
  four of this chapter or foreign corporation, existing or  authorized  on
  the  effective  date  of  this  chapter,  which  has  not designated the
  secretary of state as such agent, shall be deemed to have done so.
    (c) Any designation by a domestic  corporation  formed  under  article
  four  of  this chapter or foreign corporation of an agent other than the
  secretary of state which is in effect on  the  effective  date  of  this
  chapter shall continue in effect until changed or revoked as provided in
  this chapter.
    (d) Any designated post-office address to which the secretary of state
  shall  mail  a  copy  of  process served upon him as agent of a domestic
  corporation formed  under  article  four  of  this  chapter  or  foreign
  corporation, shall continue until the filing of a certificate under this
  chapter directing the mailing to a different post-office address.