Bombay Shops & Estbs Act; Sec: 2(13,)35,36,38, 38-B,66,
https://www.ilo.org/dyn/natlex/docs/ELECTRONIC/94257/110577/F479460477/IND94257.pdf
‘ every employee who has worked for not less than two hundred and forty days during a year [irrespective of the date of commencement of his service,] shall be allowed leave, consecutive or otherwise, for a period of not less than twenty-one days: Provided that such leave may be accumulated up to a maximum period of fortytwo days”
( So if your Manager has allowed the leave it is in accordance with the Act)
If an employee entitled to leave under sub-section (1) [or (1-A) is refused the leave, he may give intimation to the Inspector or any other officer authorised in this behalf by the [State] Government regarding such refusal. The Inspector shall enter such intimation in a register kept in such form as may be prescribed.
[The employee shall also send a copy of such intimation to his employer and, thereupon, the employee shall be entitled to carry forward the unavailed leave without any limit.
Every employee shall be paid for the period of his leave at a rate equivalent to the daily average of his wages for the days on which he actually worked during the preceding three months, exclusive of any earnings in respect of overtime.
An employee who has been allowed leave under section 35 shall, before his leave begins, be paid half the total amount due to him for the period of such leave
This Act does not lay down any Notice Period for employee.
Rather it lays down notice period for employer.
The NOTICE PERIOD in your case should be max.=30days ( that too if equitable discretion is applied, with your concurrence ort deemed concurrence)
ID Act does not lay down any Notice Period for employee.
You may confirm if standing orders of your establishment are certified and these cover your designation.
And look into list of misconducts.
If not go thru:
Model Standing Orders:Sec; 9,10, 14, 15,16,17,18
https://mahakamgar.maharashtra.gov.in/images/pdf/industrial-employment-standing-orders-rules-1946.pdf
A workman who desires to obtain leave of absence shall apply to the 6[employer or any other officer of the industrial establishment specified in this behalf by the employer], who shall issue orders on the application within a week of its submission or two days prior to the commencement of the leave applied for, whichever is earlier, provided that if the leave applied for is to commence on the date, of the application or within three days thereof, the order shall be given on the same day
Casual leave:-A workman may be granted casual leave of absence with or without pay not exceeding 10 days in the aggregate in a calendar year. Such leave shall not be for more than three days at a time except in case of sickness. Such leave is intended to meet special circumstances which cannot be foreseen. Ordinarily, the previous permission of the head of the department in the establishment shall be obtained before such leave is taken, but when this is not possible, the head of the department shall, as soon as may be practicable, be informed in writing of the absence from and of the probable duration of such absence.