508. Continuing breach of covenant.

Where the breach of covenant which gives the right of re-entry is a continuing breach1, there is a continually recurring cause of forfeiture. The demand for or acceptance of rent which is payable in arrear is only a waiver of breaches which have occurred up to the date when the rent is due2 and, where the rent is payable in advance, is a waiver of only those breaches which at the time of the demand or acceptance are known to be continuing and operates only for such period as it is definitely known they will continue3. The levy of