(a) Except as provided in Sections 946.4 and 946.6 and subject to subdivision (b), any suit brought against a public entity on a cause of action for which a claim is required to be presented in accordance with Chapter 1 (commencing with Section 900) and Chapter 2 (commencing with Section 910) of Part 3 of this division must be commenced:
(1) If written notice is given in accordance with Section 913, not later than six months after the date such notice is personally delivered or deposited in the mail.
(2) If written notice is not given in accordance with Section 913, within two years from the accrual of the cause of action. If the period within which the public entity is required to act is extended pursuant to subdivision (b) of Section 912.4, the period of such extension is not part of the time limited for the commencement of the action under this paragraph.
(b) When a person is unable to commence a suit on a cause of action described in subdivision (a) within the time prescribed in that subdivision because he has been sentenced to imprisonment in a state prison, the time limit for the commencement of such suit is extended to six months after the date that the civil right to commence such action is restored to such person, except that the time shall not be extended if the public entity establishes that the plaintiff failed to make a reasonable effort to commence the suit, or to obtain a restoration of his civil right to do so, before the expiration of the time prescribed in subdivision (a).
(c) A person sentenced to imprisonment in a state prison may not commence a suit on a cause of action described in subdivision (a) unless he presented a claim in accordance with Chapter 1 (commencing with Section 900) and Chapter 2 (commencing with Section 910) of Part 3 of this division.