(1) The emergency removal of a dead or seriously damaged tree, which adversely affects the health, safety and welfare of the property owner or the general public.

(2) If the proposed land clearing activity is regulated by a state or federal agency, which regulations may supersede those of the city.

(3) If the removal of vegetation has been ordered by the city pursuant to other sections of this code and the removal conflicts with the requirements or intent of this division, the city manager, or his designee, shall negotiate a resolution of the conflict.

(4) Land clearing activities on single-family residential lots of one acre or less in size, one year after the issuance of a certificate of occupancy for the single-family residence built upon such single-family residential lot.

(5) The harvesting of trees for a bona fide commercial use, when done in accordance with silviculture best management practices.

(6) A site, parcel or lot that is defined as having an agricultural or silvicultural purpose under this division and the proposed land clearing is to be made in conjunction with those agricultural purposes or activities and an active development order is not being sought.