According to the Financial Action Task Force (FATF), a financial institution must take certain steps to fulfill its customer due diligence (CDD) obligations [1][2]. These steps include verifying the customer's identity, understanding the customer's business, and assessing the customer's risk profile. Additionally, the financial institution must verify that the customer is not on any sanction lists, such as the OFAC Specially Designated Nationals list. This step is important to ensure that the financial institution is not doing business with any individuals or entities that are subject to economic sanctions. Other steps include obtaining information on the intended nature of the banking relationship, securing a written declaration from the customer confirming the source of the funds, and identifying shareholders listed on the stock exchange of corporate entities holding fifty percent of the shares.

Explanation
In accordance with Financial Action Task Force (FATF) standards [1][2], when the minimum AML requirements of the host country where a financial institution (Fl) operates are less strict than those of the Fl's home country, the Fl is required to ensure that their branches and majority-owned subsidiaries in host countries implement the requirements of the home country, to the extent that host country laws and regulations permit. This means that the Fl should not impose more strict requirements on host country branches, disregarding if host country laws and regulation permit such action, and should not close down its operations in the host countries where minimum AML requirements are less strict than those of the home country.
However, the Fl should always apply additional measures on their branches and majority-owned subsidiaries in host countries to manage the money laundering and terrorist financing risk overseas.

Bringing $15,000 worth of chips into the casino is a red flag because it could indicate that the customer is trying to avoid the currency transaction reporting (CTR) requirement for cash transactions over
$10,0001. Requesting a wire transfer to an unrelated third party is another red flag because it could indicate that the customer is trying to conceal the source or destination of the funds, or transfer them to a high-risk jurisdiction2.
References:
1: ACAMS CAMS Certification Video Training Course, Module 3: Casinos and Gaming, Section 3.1:
Regulatory Requirements, Slide 8 2: ACAMS CAMS Certification Video Training Course, Module 3:
Casinos and Gaming, Section 3.2: Money Laundering Methods and Red Flags, Slide 11