Where notice to quit premises has been given:
(a) a demand by the landlord for payment of rent or a sum of money as rent; or
(b) the institution of proceedings by the landlord for recovery of rent or a sum of money as rent; or
(c) the acceptance by the landlord of rent or a sum of money as rent;
in respect of a period within 6 months after the giving of the notice does not, of itself, constitute evidence of a tenancy or operate as a waiver of the notice to quit.