Section 1544 - Additional period of revocation or suspension(a) Additional point accumulation.--When any person's record shows an accumulation of additional points during a period of suspension or revocation, the department shall extend the existing period of suspension or revocation at the rate of five days for each additional point and the person shall be so notified in writing.(b) Additional suspension.--When any person's record shows an additional suspension of the operating privilege assessed during a period of suspension or revocation, the department shall extend the existing period of suspension or revocation for the appropriate period and the person shall be so notified in writing.(c) Revocation during suspension.--When any person's record shows an additional conviction calling for revocation of the operating privilege during a period of suspension, the department shall add the appropriate revocation onto the period of suspension and the person shall be so notified in writing.(d) Revocation during revocation.--When any person's record shows a conviction calling for revocation of the operating privilege during a period of revocation, the department shall extend the existing period of revocation for the appropriate period and the person shall be so notified in writing. 1976, June 17, P.L. 162, No. 81, § 1, imd. effective.