Grievance definitions clarify who qualifies as aggrieved and what constitutes a complaint under the Board's procedure. The regulations define core terms for the Board's grievance and complaint framework: aggrieved (stakeholder failing to obtain redress from a service provider), complaint (written allegation of contravention by a service provider or associated person, including complaint-cum-grievance), grievance (written expression of suffering), and complainant (filing stakeholder). Service provider and stakeholder are specifically enumerated, and undefined expressions take their meanings from the Code.