Identify the elements of the following rules:

$($a$)$

$200.$ Parties to a child custody dispute shall attempt mediation before seeking a custody order from the court.

$($b$)$

$75($b$).$ Lawyers shall not enter into a business transaction with a client if they have differing interests therein and if the client expects the lawyer to exercise his or her professional judgment therein for the protection of the client.

$($c$)$

$38.$ A person or agency suing or being sued in an official public capacity is not required to execute a bond as a condition for relief under this section unless required by the court in its discretion.

$($d$)$

$1\mathrm{.}2.$ A lawyer may not permit his or her paralegal to represent a client in litigation or other adversary proceedings or to perform otherwise prohibited functions unless authorized by statute, court rule or decision, administrative rule or regulation, or customary practice.

$($e$)$

$179($a$)(7).$ If at any time it is determined that application of best available control technology by $1988$ will not assure protection of public water supplies, agricultural and industrial uses, and the protection and propagation of fish, shellfish, and wildlife, and allow recreational activities in and on the water, additional effluent limitations must be established to assure attainment or maintenance of water quality. In setting such limitations$,$ the Environmental Protection Agency must consider the relationship of the economic and social costs of their achievement, including any economic or social dislocation in the affected community or communities, the social and economic benefits to be obtained, and determine whether or not such effluent limitations can be implemented with available technology or other alternative control strategies.