Final answer:
Steven may have a claim for negligence against Building Future Limited (BFL) and Reliable Development Limited (RDL) since duty of care was potentially breached. However, the enforceability of RDL's exclusion clause could limit Steven's ability to recover damages. Scrutiny under Hong Kong law, such as the Control of Exemption Clauses Ordinance (Cap 71), will determine whether the clause is fair and reasonably applied.
Step-by-step explanation:
The situation described presents a potential case of tortious liability in the area of negligence and occupier's liability, along with challenges regarding the enforcement of exclusion clauses. Under the Hong Kong legislation, a party injured due to the negligence of another can seek compensation; however, the enforceability of the exclusion clause displayed by RDL could potentially limit Steven's ability to recover damages. Duty of Care by BFL and RDL to ensure the safety of individuals near the site may have been breached, particularly since Leon was unlicensed to operate the crane. Moreover, reliance on the site manager's assurance can be considered under the Misrepresentation Ordinance (Cap 284).
Though the exclusion clause aims to limit liability, Courts in Hong Kong traditionally approach such clauses with scrutiny, especially when considering whether the clause was fairly and reasonably brought to the attention of the person affected. Given that Steven was injured and his property was damaged despite being outside the construction site, there is also a possibility to challenge the exclusion clause's fairness and reasonableness under the Control of Exemption Clauses Ordinance (Cap 71).
As for Steven's awareness of the notice, his knowledge does not necessarily negate RDL's responsibility, especially if negligence can be established. A crucial aspect would be determining whether the notice meets the requirement of being a sufficient warning and whether RDL has taken reasonable steps to mitigate dangers arising from the construction activities. The standard applied here would be that of a 'reasonable person'. The fact that Leon falsely claimed to have a licence to operate the crane further exacerbates the negligence claim against BFL and possibly RDL for failing to conduct appropriate due diligence.
To conclude, Steven may have grounds to seek damages due to negligence, while the effectiveness of the exclusion clause to bar his claim may be questioned based on the specifics of the case and relevant statutes such as Cap 71. Steven should consult a legal professional in Hong Kong to explore his options based on the circumstances and the applicability of tort and contract law principles.