(a) Custodians who have the qualifications required by the certifying board and who work and are paid for 12 months per year shall be paid in accordance with the following schedule:

(b) The salaries stipulated in subsection (a) of this section shall be increased for special training as defined by the certifying board by the addition of the following annual amount:

(c) One twelfth of the salary rate set forth under subsection (a) of this section shall be deducted for each month that the employee is not employed.

46 Del. Laws, c. 48, § 4; 47 Del. Laws, c. 195, § 1; 48 Del. Laws, Sp. Sess., c. 489, § 4; 14 Del. C. 1953, § 1311; 50 Del. Laws, c. 261, § 5; 50 Del. Laws, c. 602, § 1; 51 Del. Laws, c. 199, § 1; 51 Del. Laws, c. 279, § 1; 52 Del. Laws, c. 344, § 9; 54 Del. Laws, c. 43, § 7; 55 Del. Laws, c. 409, § 5; 56 Del. Laws, c. 143, § 3; 56 Del. Laws, c. 292, § 13; 56 Del. Laws, c. 470, § 4; 57 Del. Laws, c. 333, §§ 9, 10; 58 Del. Laws, c. 192, § 1; 58 Del. Laws, c. 304, § 1; 59 Del. Laws, c. 34; 60 Del. Laws, c. 33, §§ 1, 2; 61 Del. Laws, c. 407, § 3; 61 Del. Laws, c. 409, § 106; 62 Del. Laws, c. 68, § 42(e); 62 Del. Laws, c. 277, § 11(f); 63 Del. Laws, c. 80, § 11(f); 63 Del. Laws, c. 322, § 11(f), (g); 64 Del. Laws, c. 90, § 11(d)(vii); 64 Del. Laws, c. 220, § 6(a), (b); 64 Del. Laws, c. 334, § 11(j)(7), (8); 65 Del. Laws, c. 87, § 11(k)(3); 65 Del. Laws, c. 348, § 12(r)(6), (7); 66 Del. Laws, c. 85, § 12(p)(6), (7); 66 Del. Laws, c. 303, § 12(m)(6); 67 Del. Laws, c. 47, § 12(o)(8); 67 Del. Laws, c. 281, § 8(o)(3); 68 Del. Laws, c. 84, § 8(m)(2); 68 Del. Laws, c. 290, § 8(m)(3); 69 Del. Laws, c. 64, § 8(m)(3); 69 Del. Laws, c. 291, § 8(i)(5), (6); 70 Del. Laws, c. 118, § 8(i)(3); 70 Del. Laws, c. 186, § 1; 70 Del. Laws, c. 425, § 8(i)(3); 71 Del. Laws, c. 132, §§ 8(m)(3), 377; 71 Del. Laws, c. 180, § 69; 71 Del. Laws, c. 354, §§ 8(n)(3), 374, 375; 72 Del. Laws, c. 94, § 8(n)(4); 72 Del. Laws, c. 395, § 8(n)(3); 73 Del. Laws, c. 74, § 8(n)(3); 73 Del. Laws, c. 312, § 8(m)(3); 74 Del. Laws, c. 307, § 8(m)(4); 75 Del. Laws, c. 89, § 8(m)(4); 75 Del. Laws, c. 350, § 8(m)(3); 76 Del. Laws, c. 80, § 8(m)(3); 77 Del. Laws, c. 84, § 8(m)(3); 77 Del. Laws, c. 327, § 8(m)(3); 78 Del. Laws, c. 78, § 8(m)(8), (15); 78 Del. Laws, c. 290, § 8(m)(5)(iv); 79 Del. Laws, c. 78, § 8(m)(5)(iv); 79 Del. Laws, c. 290, § 8(m)(5)(iv), (6)(iv); 80 Del. Laws, c. 298, § 8(m)(5)(iv); 81 Del. Laws, c. 58, § 8(m)(5)(iv); 81 Del. Laws, c. 280, § 8(m)(6)(iv); 82 Del. Laws, c. 64, § 8(m)(6)(iv).