(2) Where the manner of service prescribed for actions or proceedings
in this court includes delivery of the summons to a person at the actual
place of business of the person to be served, such delivery may be made
alternatively to a person of suitable age and discretion at the address
registered with the department charged with the enforcement of local
laws relating to housing maintenance pursuant to article forty-one of
such code, hereinafter referred to as the "registered address".
(3) Where the manner of service prescribed for actions or proceedings
in this court includes affixing the summons to the door of the actual
place of business of the person to be served, the summons may, as an
alternative, be posted in a conspicuous place on either the premises
specified in the summons or the registered address.
(4) Where the manner of service for actions or proceedings in this
court includes mailing the summons to the person to be served at his
last known residence, the summons may, as an alternative, be mailed to
the registered address; however, if the person to be served has not
registered as required by article forty-one of such housing maintenance
code, such summons may, as an alternative, be mailed to an address
registered in the last registration statement filed with such department
other than the address of the managing agent of the premises and to the
last known address of the person to be served.