Among Thais, there are strict rules of hierarchy that dictate how and when the wai should be given.
1	Among	among	ADP	IN	_	2	case	2:case	Discourse=organization-preparation:18->20:1
2	Thais	Thai	PROPN	NNPS	Number=Plur	5	obl	5:obl:among	Entity=(2-person-giv:inact-cf2-1-coref-Thai_people)|SpaceAfter=No
3	,	,	PUNCT	,	_	2	punct	2:punct	_
4	there	there	PRON	EX	PronType=Dem	5	expl	5:expl	_
5	are	be	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
6	strict	strict	ADJ	JJ	Degree=Pos	7	amod	7:amod	Entity=(15-abstract-new-cf3-2-sgl
7	rules	rule	NOUN	NNS	Number=Plur	5	nsubj	5:nsubj|11:nsubj	_
8	of	of	ADP	IN	_	9	case	9:case	_
9	hierarchy	hierarchy	NOUN	NN	Number=Sing	7	nmod	7:nmod:of	_
10	that	that	PRON	WDT	PronType=Rel	11	nsubj	7:ref	Discourse=elaboration-attribute:19->18:0
11	dictate	dictate	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	acl:relcl	7:acl:relcl	_
12	how	how	SCONJ	WRB	PronType=Rel	11	obj	11:obj	_
13	and	and	CCONJ	CC	_	14	cc	14:cc	_
14	when	when	SCONJ	WRB	PronType=Int	12	conj	11:obj|12:conj:and	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	16:det	Entity=(9-event-giv:act-cf1*-2-coref
16	wai	wai	NOUN	NN	Number=Sing	19	nsubj:pass	19:nsubj:pass	Entity=9)
17	should	should	AUX	MD	VerbForm=Fin	19	aux	19:aux	_
18	be	be	AUX	VB	VerbForm=Inf	19	aux:pass	19:aux:pass	_
19	given	give	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	12	advcl:relcl	12:advcl:relcl	Entity=15)|SpaceAfter=No
20	.	.	PUNCT	.	_	5	punct	5:punct	_
